8 men can dig a pit in 20 days. If a man works half as much again as a boy, then 4 men and 9 boys can dig a similar pit in:__________?
A. 12 days
B. 16 days
C. 18 days
D. 20 days
Basic Arithmetic
wo pipes X and Y fill a tank in 15 hrs. and 20 hrs. respectively, while a third pipe ‘Z’ can empty the full tank in 25 hrs. All the three pipes are opened in the beginning. After 10 hrs. Z is closed. In how much time, will the tank be full ?
A. 12 hrs
B. 14 hrs
C. 16 hrs
D. 18 hrs
A boy goes to his school from his house at a speed of 3 km / hr and returns at a speed of 2 km / hr. If he takes 5 hours in going and coming, the distance between his house and school is :___________?
A. 5 km
B. 5.5 km
C. 6 km
D. 6.5 km
A train when moves at an average speed of 40 kmph, reaches its destination on time. When its average speed becomes 35 kmph, then it reaches its destination 15 minutes late. Find the length of journey.
A. 30 km
B. 40 km
C. 70 km
D. 80 km
A can complete a journey in 10 hours. He travels first half of the journey at the rate of 21 km / hr and second half at the rate of 24 km / hr. Find the total journey in km.
A. 220 km
B. 224 km
C. 230 km
D. 234 km
A walks around a circular field at the rate of one round per hour while B runs around it at the rate of six rounds per hour. They start in the same direction from the same point at 7.30 a.m. They shall first cross each other at :___________?
A. 7.42 a.m.
B. 7.48 a.m.
C. 8.10 a.m.
D. 8.30 a.m.
An express train travelled at an average speed of 100 km / hr, stopping for 3 minutes after every 75 km. How long did it take to reach its destination 600 km from the starting point ?
A. 6 hrs 21 min
B. 6 hrs 24 min
C. 6 hrs 27 min
D. 6 hrs 30 min
A car is running at a speed of 108 kmph. What distance will it cover in 15 seconds ?
A. 45 metres
B. 55 metres
C. 450 metres
D. Cannot be determined
The areas of the three adjacent faces of a rectangular box which meet in a point are known. The product of these areas is equal to :___________?
A. the volume of the box
B. twice the volume of the box
C. the square of the volume of the box
D. the cube root of the volume of the box
A train covers a distance of 10 km in 12 minutes. If its speed is decreased by 5 km /hr, the time taken by it to cover the same distance will be :__________?
A. 10 min
B. 11 min 20 sec
C. 13 min
D. 13 min 20 sec