Time, Speed and Distance

 

Time Speed and Distance.

1. Deccan Queen started from Pune in the same direction, two hours after Sinhagad Express that left exactly at noon. Deccan Queen overtook Sihagad Express at 8.00 p.m. Find the average speed of the two trains over the distance they had covered if the sum of their average speeds is 70 km/hr.

(a) 34.28 km/hr. (b) 35 km/hr. (c) 50 km/hr. (d) 12 km/hr.

2. Calcutta Mail and Bombay Mail start at the same time from Calcutta and Bombay respectively towards each other. After their crossing they take 12 hours and 3 hours respectively to reach Bombay and Calcutta. If the speed of the Calcutta Mail is 48 km/hr. then what is the speed of the Bombay Mail?

(a) 24 km/hr. (b) 22 km/hr. (c) 96 km/hr. (d) 120 km/hr.

3. Driving at a speed of 60 km/hr. Sunit covers a distance in 40 minutes. At what speed he should drive so as to reduce the travel time by 25%.

(a) 60 km/hr. (b) 70 km/hr. (c) 80 km/hr. (d) 90 km/hr.

4. Two trains starting from A and B are travelling towards each other at speeds of 50 km/hr and 60 km/hr respectively. At the time of their meeting the faster train had travelled 120 kms more than the slower train. What is the distance between the stations A and B?

(a) 1200 kms (b) 1320 kms (c) 1420 kms (d) 1500 kms.

5. A plane left half an hour later than the schedule departure time, and in order to reach its destination 1500 kms away on time, it increased its normal speed by 33 1/3 %. What is its increased speed?

(a) 250 kmph (b) 500 kmph (c) 750 kmph (d) 1000 kmph.

Answers:

1. (a) 2. (c) 3. (d) 4. (b) 5. (d)