Ques:- if length of a rectangle is incr by 20% and width is decr by 20% then area
Recent Answer : Added by Admin On 2020-05-17 11:59:46:
we know,
area=b*h
b gets increased by 20% i.e (b+0.20b)
h gets decreased by 20% i.e (h-0.20h)
rewriting the equation(area=b*h),
area=(b+0.20b)*(h-0.20h)
area=b(1+0.20)*h(1-0.20)
area=b(1.20)*h(0.80)
area=b*h*(1.20)*(0.80)
area=b*h*(0.96)
i.e new area=0.96 times the original area
if 100% was the original area,it has decreased to 96%
so,100%-96%= 4%
Ques:- A 50m wide river is flowing endlessly. Two boys are standing near the lakeside, wanting to cross the river. A boat is tied to a tree nearby. The boat is however weak and can carry only one person at a time. Both of them still manage to cross the river. How did they manage to do it?
Recent Answer : Added by kavin On 2021-07-17 10:05:48:
It is mentioned the the boat is tied with the rope to the tree. So first one will be crossing the river and the other with the help of the ropes tied to the tree will be able to pull the both back and then he will be crossing the river.
Ques:- The LCM of two numbers is 24. The GCF is 4. One number is 4 more than the other. What are the numbers.
Recent Answer : Added by Mayuri On 2021-07-08 16:28:56:
24*4= x(x+4)
solve this
answer is x=8
X+4= 12
Ques:- In a certain code, BELIEF is written as AFKKDI. How is SELDOM written in that code ?
Recent Answer : Added by Nagarjuna On 2022-10-27 17:33:12:
D
Ques:- Barbara has boxes in three sizes: large, standard, and small. She puts 11 large boxes on a table. She leaves some of these boxes empty, and in all the other boxes she puts 8 standard boxes. She leaves some of these standard boxes empty, and in all the other standard boxes she puts 8 (empty) small boxes. Now, 102 of all the boxes on the table are empty. How many boxes has Barbara used in total?
Ques:- How you convience the customer?
Ques:- The difference between a two-digit number and the number obtained by interchanging the digits is 36. What is the difference between the sum and the difference of the digits of the number if the ratio between the digits of the number is 1 : 2 ?
Recent Answer : Added by Alisha Ravika Kar On 2022-08-14 16:43:27:
The number is greater than the number obtained in reversing the digits and the ten’s digit is greater than the unit’s digit
Let ten’s and unit’s digit be 2x and x respectively
Then, (10×2x+x)−(10x+2x)=36
9x=36
x=4
Required difference=(2x+x)−(2x−x)=2x=8
Ques:- Surface area of two spheres are in the ratio 1:4 what is the ratio of their volumes?
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Ques:- A man spends half of his salary on household expenses, 1/4th for rent, 1/5th for travel expenses, the man deposits the rest in a bank. If his monthly deposits in the bank amount 50, what is his monthly salary ?(a) Rs.500(b) Rs.1500(c) Rs.1000(d) Rs. 900
Recent Answer : Added by DK BOSS On 2021-07-17 06:22:58:
option c is the answer
as
1/2 for household
1/4 for rent
1/5 for travel
remaining for deposit in bank(i.e) 1/2+1/4+1/5=19/20 ; 1-19/20=1/20
so 1/20 for deposit
1/20(x)=50
hence x=1000
option c is the answer
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Ques:- A circle is inscribed in a Triangle of side 6cm. What is the area of circle?
Recent Answer : Added by ankita On 2022-08-14 16:34:24:
27 root 3
Ques:- 125 : 216 :: 1331 : __
Recent Answer : Added by nikhil On 2022-08-14 16:28:16:
1728
Ques:- Please tell me what about your self?
Ques:- At a game of billiards, A can give B 15 points in 60 and A can give C to 20 points in 60. How many points can B give C in a game of 90?
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Ques:- Kamal started a business investing Rs. 9000. After five months, Sameer joined with a capital of Rs. 8000. If at the end of the year, they earn a profit of Rs. 6970, then what will be the share of Sameer in the profit?
Recent Answer : Added by Admin On 2022-09-29 15:55:33:
Now as per question, Kamal invested for 12 months and Sameer invested for 7 months.
So, Kamal:Sameer=(9000×12):(8000×7)
=108.56=27:14
Sameer ratio in profit will be =6970×4114=Rs.2380
Ques:- There are 15 black and 5 white balls. Find the probability of drawing 3 balls so that there is no white ball .
Ques:- Four sisters- Purva, Durga, Parvati and Maya are playing a game such that the loser doubles the money of each of the other players from her share. They played four games and each sister lost one game in alphabetical order. At the end of fourth game, each sister has Rs. 32. What was the amount with Uma at the end of the second round?
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Ques:- P, Q and R invests Rs.2000, Rs.3000 and Rs.4000 in a business. After one year P removed his money; Q and R continued the business for one more year. If the net profit after 2 years be Rs.3200, then P’s share in the profit is?
Recent Answer : Added by Admin On 2022-09-28 19:14:13:
Complete step-by-step answer:
Investment made by A for 1 year, IA=2000
Investment made by B for 2 year,
IB=2×3000IB=6000
Investment made by C for 2 year,
IC=2×4000IC=8000
The ratio of their investment is given by
IA:IB:IC=2000:6000:8000
To simplify the ratio divide it by 1000,
IA:IB:IC=2:6:8
Now again to simplify divide the ratio by 2,
IA:IB:IC=1:3:4
The total parts of this investment =1+3+4=8
A’s share in the investment is 1 out of the 8 parts; B’s share is 3 out of 8 while C’s share is 4.
Therefore, the profit share of A’s investment of Rs. 2000=18×3200=400.
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Ques:- A pipe fill a tank in 3hrs.another pipe fill that same tankin 2hrs.if both pipe inserted in tank to fill it how timw itwill take to fill?
Recent Answer : Added by MUGILARASU On 2022-09-15 16:39:02:
consider the tank capacity as 90 litres.
to fill the tank in 3 hrs first pipe must flow at a rate of 30 litres/hr
2nd pipe has to flow at a rate of 45 litres/hr
if two pipes are opened at a time the flow rate will become 75 litres/hr
90/75= 6/5 = 1.2= (i.e) 1hr and 12 minutes 1 1/5 hr
Ques:- If we declare a pointer like char *p; how much memory is allocated for pointer variable 'p'.
Ques:- Present ages of Sameer and Anand are in the ratio of 5:4 respectively. Three years hence, the ratio of their ages will become 11:9 respectively. What is Anand’s present age in years?
Ques:- How do you Handle Pressure?
Ques:- Eulers formula ?
Recent Answer : Added by Admin On 2020-05-17 12:01:12:
F+V-E =2;
F= faces;V= vertices;E = number of edges
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we know,
area=b*h
b gets increased by 20% i.e (b+0.20b)
h gets decreased by 20% i.e (h-0.20h)
rewriting the equation(area=b*h),
area=(b+0.20b)*(h-0.20h)
area=b(1+0.20)*h(1-0.20)
area=b(1.20)*h(0.80)
area=b*h*(1.20)*(0.80)
area=b*h*(0.96)
i.e new area=0.96 times the original area
if 100% was the original area,it has decreased to 96%
so,100%-96%= 4%