Ques:- A boat takes 90 minutes less to travel 36 miles downstream than to travel the same distance upstream. If the speed of the boat in still water is 10 mph, the speed of the stream is:
Recent Answer : Added by Sanjeevnaidu On 2022-09-02 17:04:42:
Let speed of stream be v mph
Then,
36/(10-v) = 1.5hr + 36/(10+v)
On solving, we get speed of stream as v = 2mph.
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Ques:- Next number in the series is 1 , 2 , 4 , 13 , 31 , 112 , ?
Recent Answer : Added by Admin On 2022-09-28 17:52:05:
1, 2, 4, 13, 31, 112,?
This series is written in base 5 numbers for decimal nos of 1,2,4,8,16,32,64
so next number is 224 .
224 in base 5 = 64 in base 10.
so 224 is next number.
Ques:- In a 10 digit number, if the 1st digit number is the number of ones, 2nd digit number is the number of twos, and so on. 10th digit is the number of zeroes, then find the number
Recent Answer : Added by Raju On 2022-04-05 16:00:09:
0987654321
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Ques:- Difference between two numbers is 5, six times of the smaller lacks by 6 from the four times of the greater. Find the numbers?
Recent Answer : Added by Rajaprasanna On 2021-06-23 17:55:29:
x=12;y=7
Ques:- A certain number of men can finish a piece of work in 10 days. If however there were 10 men less it will take 10 days more for the work to be finished. How many men were there originally?
Recent Answer : Added by Admin On 2022-09-28 18:22:01:
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Lipimishra2
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Let the no. of men (originally) be x.
x no. of men require 10 days.
if however there were 10 men less it will take 10 days more for the work to be finished. ——> means x-10 men require 10+10=20 days.
10x = 20 (x-10)
x = 2x -20 => x = 20.
Ques:- A train 280 m long is moving at 60 km/hr. Time taken by the train to cross a tunnel 220 m long is
A. 15 sec
B. 20 sec
C. 25 sec
D. 30 sec
Recent Answer : Added by Swapna On 2022-10-07 17:19:10:
30 Sec
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Ques:- What is the missing number in the series. 1, 4, 27, 256, ?, 46656
Recent Answer : Added by Deepikaa Nandakumar On 2022-05-17 09:08:52:
1^1,2^2,3^3,4:^4,5^5,6^6
1,4,27,256,3125,46656
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Recent Answer : Added by kawooya Alex On 2021-10-07 15:41:29:
12
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Ques:- A train of length 150 m takes 40.5 seconds to cross a tunnel of length of 300 m. The speed of the train (in km/hr) is
A. 13.33
B. 26.67
C. 38.32
D. 40
Recent Answer : Added by memo On 2023-01-10 14:35:10:
Since the total train length passed the tunnel so the distance would be the length of train added to the tunnel legth
D=150+300=450 mt.
speed = distance/time
speed = 450/(40.5/3600)
speed =40,000 mt/sec
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Ques:- The time taken by a man to row his boat upstream is twice the time taken by him to row the same distance downstream. If the speed of the boat in still water is 42 kmph, find the speed of the stream?
Recent Answer : Added by Abdul On 2022-08-14 16:44:25:
14 km/h
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Recent Answer : Added by Namrata On 2021-07-25 09:41:13:
heat loss from a surface can be reduced by polishing the surface coz polished surface is bad radiator and bad absorber of heat
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Let speed of stream be v mph
Then,
36/(10-v) = 1.5hr + 36/(10+v)
On solving, we get speed of stream as v = 2mph.