A car driver is driving a car at a speed of 70 km/h, and a bus is moving 35 meters ahead of him. After 15 seconds, the bus was 40 meters behind him. Find out the speed of the bus.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 52 km/h.
Let's assume the speed of Bus = x km/h
1(meters/seconds) = 3600/1000 (kilometer/hour)
Relative speed in same direction = S1 - S2
Total distance/total time = Relative Speed
⇒ [(40 + 35)/15] × 3600/1000 = (70 - x)
⇒ 75 × 18/75 = 70 - x
⇒ x = 70 - 18 = 52 km/h