**701. 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.****A. 10 km**

B. 8 km

C. 12 km

D. 9 km

**Explanation:****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**

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

A. 133.33 kmph

B. 1.33 kmph

C. 4 kmph**D. 8 kmph**

**Explanation:****He crosses 0.4 km in 3/60th of an hour. Speed = 0.4/(1/20) = 8 kmph**

**703. 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?****A. 17:13**

B. 17:30

C. 13:30

D. None of these

**704. How much time does a train 125 meters long running at 60 km/hr. take to pass a pole?**

A. 6s

B. 2.08s**C. 7.5s**

D. 8s

**Explanation:****60 km/hr = 60 * 5/18 = 16.67 m/s****Speed = distance/time; v = d/t****16.67 = 125/t****t = 7.5s**

**705. 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?**

A. 1 hr 42 min

B. 1 hr

C. 2 hr**D. 1 hr 12 min**

**Explanation:****New speed = 6/7 of usual speed****Speed and time are inversely proportional.****Hence new time = 7/6 of usual time****Hence, 7/6 of usual time – usual time = 12 minutes****=> 1/6 of usual time = 12 minutes****=> usual time = 12 x 6 = 72 minutes****= 1 hour 12 minutes**

**706. Excluding stoppages, the speed of a bus is 54 kmph and including stoppages, it is 45 kmph. For how many minutes does the bus stop per hour?**

A. 12

B. 11**C. 10**

D. 9

**Explanation:****speed of the bus excluding stoppages = 54 kmph****speed of the bus including stoppages = 45 kmph****Loss in speed when including stoppages = 54 – 45 = 9kmph****=> In 1 hour, bus covers 9 km less due to stoppages****Hence, time that the bus stop per hour = time taken to cover 9 km****=distance/speed=9/54 hour=1/6 hour = 60/6 min=10 min**

**707. 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?**

A. 39 seconds**B. 40 seconds**

C. 39.38 seconds

D. 39.5 seconds

**Explanation:****The first pole is crossed at the zeroth second. The timer starts after the car crosses the first pole. Let the distance between each pole be x m. To reach the 16th pole, the distance travelled by the car is 15x. The speed of the car is 15x/30 = x/2 m/s To reach the 21st pole, it has to travel a distance of 20x. Time taken****= 20x÷(x/2)****= 40 seconds**

**708. A person walking at 5/6th of his usual speed is 40 minutes late to his office. What is his usual travel time to his office?****A. 3 hours 20 minutes**

B. 3 hours 15 minutes

C. 3 hours 30 minutes

D. 3 hours

**Explanation:****Let his usual speed be x kmph, the distance to his office be y km and his usual travel time be t hrs. y = xt = (5/6)x * (t+(40/60)) Solving the equation,****t = 3.33 hrs = 3 hrs 20 minutes**

**709. A Man travelled a distance of 61 km in 9 hours. He travelled partly on foot at 4 km/hr and partly on bicycle at 9 km/hr. What is the distance travelled on foot?**

A. 12 km

B. 14 km**C. 16 km**

D. 18 km

**710. A person crosses a 600 m long street in 5 minutes. What is his speed in km per hour?**

A. 8.2

B. 4.2

C. 6.1**D. 7.2**