Question
Question: A jeep moves at uniform speed of 60 kmh<sup>-1</sup> on a straight road blocked by a wall. The jeep ...
A jeep moves at uniform speed of 60 kmh-1 on a straight road blocked by a wall. The jeep has to take a sharp perpendicular turn along the wall. A rocket flying at uniform speed of 100 kmh-1 starts from the wall towards the jeep when the jeep is 30 km away. The rocket reaches the windscreen and returns to wall. Total distance covered by the rocket is
A
100 km
B
50 km
C
25km
D
75km
Answer
50 km
Explanation
Solution
The time taken by jeep to cover a distance of 30 km
= Distance/Speed
= 30/60 = 1/2 hr.
Total distance covered by rocket in this duration
= speed × time
= 100 × ½ = 50 km