1.  A lions starts chasing a Giraffe. It takes 4 hours


20 km/h
50 km/h
40 km/h
70 km/h


Answer

 Option

Giraffe speed = x kmph 4 = 4 * x/ (40 -x ) x = 20 km/h.

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2.  A travel bus normally reaches its destination at 60 kmph in 20 hours. Find the speed of that travel bus at which it travels to reduce the time by 5 hours?


80 kmph
60 kmph
50 kmph
40 kmph


Answer

 Option

60*20 = x * 15 x = 80 kmph

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3.  Mr. kavin walks at 4/5 of his normal speed and takes 60 minutes more than the usual time. What will be the new time taken by Mr.kavin?


260 minutes
235 minutes
220 minutes
300 minutes


Answer

 Option

4/5 of speed = 5/4 of original time 5/4 of original time = original time + 60 minutes 1/4 of original time = 60 minutes Thus, original time = 60*4 = 240 minutes = 240+60 = 300 minutes

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4.  A truck travelled to a place Q from P, The first 50 km at 10 kmph faster than the usual speed, but it returned the same distance at 10 kmph slower than usual speed. If the total time taken by the truck is 12 hours, then how many hours will travel at the faster speed?


8 hours
6 hours
2 hours
3 hours


Answer

 Option

Total time taken, {50/(x - 10)} + 50/(x+10)} = 12 hours By solving the equation, we get x = 15 time is taken by the truck at faster speed = 50/(15+10) = 2 hours.

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5.  Two persons A and B start from the opposite ends of a 450 km straight truck and run to and from between the two ends. The speed of the first person is 25 m/s and the speed of other is 35 m/s. They continue their motion for 10 hours. How many times did they pass each other?


1
4
3
2


Answer

 Option

First person speed = 25m/s *18/5 = 90 kmph. Second person speed = 35m/s *18/5 = 126 kmph. First person covers 90*10 = 900 km 900/450 = 2

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