A man covers a distance of 20 km in 3.5 hours partly by running and partly by walking. If he walks at 4 kmph and runs at 10 kmph, find the distance he covers by walking.

March 28, 2020 – by Arif Khan 0

A. 10 km
B. 8 km
C. 12 km
D. 9 km

Let the distance covered by walking be x km
the distance covered by running be (20-x) km Time for walking + time for running = 3.5 hours (x/4)+[(20-x)/10]=3.5 Solving,
5x+40-2x = 70
3x=30
x=10km

A man goes to his office 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, what is the distance between his house and office?

March 28, 2020 – by Arif Khan 0

A. 3 km
B. 4 km
C. 5 km
D. 6 km

If the sum of two numbers is 33 and their difference is 15, the smaller number is :__________?

March 28, 2020 – by Arif Khan 0

A. 9
B. 12
C. 15
D. 18

Two bikes start at the same time from two destination 300 km apart and travel towards each other. If they cross each other at a distance of 130 km from one of the destination, what is the ratio of their speeds?

March 28, 2020 – by Arif Khan 0

A. 17:13
B. 17:30
C. 13:30
D. None of these

Rayan crosses a 400m bridge in 3 minutes. What is speed?

March 28, 2020 – by Arif Khan 0

A. 133.33 kmph
B. 1.33 kmph
C. 4 kmph
D. 8 kmph

If the sum of a number and its square is 182, what is the number ?

March 28, 2020 – by Arif Khan 0

A. 15
B. 26
C. 28
D. 13

A man 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.

March 28, 2020 – by Arif Khan 0

A. 121 km
B. 242 km
C. 224 km
D. 112 km

There are 21 poles with a constant distance between each pole. A car takes 30 seconds to reach the 16th pole. How long does it take to reach the last pole?

March 28, 2020 – by Arif Khan 0

A. 39 seconds
B. 40 seconds
C. 39.38 seconds
D. 39.5 seconds

Walking 6/7th of his usual speed, a man is 12 minutes too late. What is the usual time taken by him to cover that distance?

March 28, 2020 – by Arif Khan 0

A. 1 hr 42 min
B. 1 hr
C. 2 hr
D. 1 hr 12 min

How much time does a train 125 metres long running at 60 km/hr take to pass a pole?

March 28, 2020 – by Arif Khan 0

A. 6s
B. 2.08s
C. 7.5s
D. 8s