Ques:- Radius of sphere is increased by 50%. By how much percentage is surface area is increased?
Recent Answer : Added by Admin On 2020-05-17 11:59:36:
let original radius=100
original surface area lets say it x =4 * (22/7) * 100 *100
new radius=100 + 50% of 100=150
new surface area lets say it y = 4 * (22/7)* 150* 150
increase in surface area=((y-x)/x) * 100
i.e.
((4*(22/7)*150*150 – 4*(22/7)*100 *100) / (4*(22/7)*100*100))*100
=125
so the answer is 125%.
hope this helps you.
Ques:- A person buy the 6, 1 Rs stamps and 7, 50 paisa stamps he has given 12 Rs how much he will get back.
Recent Answer : Added by Admin On 2020-05-17 11:59:49:
6+3.50= 2.50
Ques:- Three 6 faced dice are thrown together. The probability that exactly two dice show the same number on them is -.
Recent Answer : Added by Admin On 2022-09-28 18:05:55:
Let A, B and C be the three 6-faced dice.
Then, according to the question,
Since two dices has to be equal, that value can be any of the 6 faces, i.e., 6C1 cases.
Now for each case, 2 equal dices can be selected from 3 dices in 3C2 i.e., 3 ways.
And for each of the above, the third dice can have any of the 5 remaining faces
The possible outcomes are P(A)=61,P(B)=61,P(C)=65,P(A)=61,P(B)=65,P(C)=61 and P(A)=65,P(B)=61,P(C)=61
Hence the required probability = 61×61×65×6×3=21690=125
Ques:- You have a bucket of jelly beans. Some are red, some are blue, and some green. With your eyes closed, pick out 2 of a like color. How many do you have to grab to be sure you have 2 of the same?
Recent Answer : Added by Juan On 2022-08-14 16:25:19:
at least 2, at most 4….
2 if you get lucky the first 2 times you draw a jelly bean, 4 would be if in the first 3 tries you get one of each color and the next draw will get you 2 of the same color
Ques:- The G.C.D. of two whole numbers is 5 and their LCM is 60. If one of the number is 20, then the other number would be
A. 13
B. 15
C. 16
D. 25
Recent Answer : Added by Shravani Annameni On 2022-08-14 16:33:23:
Recent Answer : Added by Vivek Bharti On 2022-09-02 17:04:37:
122
Ques:- One train leaves Los Angeles at 15mph heading for New York. Another train leaves from New York at 20mph heading for Los Angeles on the same track. If a bird, flying at 25mph, leaves from Los Angeles at the same time as the train and flies back and forth between the two trains until they collide, how far will the bird have traveled?
Recent Answer : Added by Admin On 2020-05-17 12:01:54:
insufficient information distance between LA and NY is not
given it should be given to find the no solution
Ques:- What is efficiency of transformer?
Ques:- Introduce yourself with family and educational background
Ques:- Do you feel you work more effectively on a one to one basis or in a group situation?
Recent Answer : Added by RITESH KATARWAR On 2021-11-18 17:15:58:
group wise work is use full and effectively
Ques:- The LCM of 148 and 185 is
A. 3700
B. 2960
C. 740
D. 680
Recent Answer : Added by R.Geethanjali On 2022-04-02 06:59:22:
740
Ques:- Have you ever had to fire anyone? How did you feel about that?
Ques:- In your opinion, what is the most beautiful math equation ever derived?
Ques:- Two taps can separately fill a cistern 10 minutes and 15 minutes respectively and when the waste pipe is open, they can together fill it in 18 minutes. The waste pipe can empty the full cistern in?
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Ques:- You have a bag of with ‘N’ number of strings. At random, you pull out a string’s end.You pull out another string end and you tie the two together.You repeat this until there are no loose ends left to pull out of the bag.What is the expected number of loops?
Ques:- “An army travels 50 miles long at a constant rate. A courier standing at the rear moves forward and delivers the message to the first person and then turns back and reaches the rear of the army as the army completes 50 miles. Find the distance travelled by the courier.”
Ques:- Q is as much younger than R as he is older than T. If the sum of the ages of R and T is 50 years. What is definitely the difference between R and Q’s age?
Ques:- 10 books are placed at random in a shelf. The probability that a pair of books will always be together is -.
Recent Answer : Added by Mahomed On 2021-08-24 15:05:46:
All books can be arranged in 10! ways. A single pair of books can be taken as a unit and arranged among the 8 others in 9! ways. The pair of books can also be interchanged and therefore rearranged in 2! ways. Thus the probability of the pair always being together is (9!*2!)/10!
Ques:- (165)2 – (164)2 =
Ques:- What do you thimk about The President?
Ques:- A person needs 6 steps to cover a distance of one slab. If he increases his foot length (step length) by 3 inches, he needs only 5 steps to cover the slabs length. What is the length of the each slab
Recent Answer : Added by Gary On 2021-08-23 11:42:46:
90 inches
Slab = 6(x) where x is each step
Slab = 5(x + 3)
6(x) = 5(x + 3)
6(x) = 5(x) + 15
x = 15 inches
So 6(x) = 6(15) = 90
Check: 5( x + 3) = 5(18) = 90
Slab size is 90 inches
Ques:- Describe a situation in which you were able to effectively “read” another person and guide your actions by your understanding of their individual needs or values.
Ques:- Can you describe for me one or two of your most important accomplishments?
let original radius=100
original surface area lets say it x =4 * (22/7) * 100 *100
new radius=100 + 50% of 100=150
new surface area lets say it y = 4 * (22/7)* 150* 150
increase in surface area=((y-x)/x) * 100
i.e.
((4*(22/7)*150*150 – 4*(22/7)*100 *100) / (4*(22/7)*100*100))*100
=125
so the answer is 125%.
hope this helps you.