Question

# A car starts at P, and travels at a speed of 50 km h−1 for 6 hours. It comes to rest at Q. 2 hours after the first car starts, another car starts at P and moves towards Q. In order to reach the point Q at the same time as the first car, with what speed must the second car travel?

A
65 km h1
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
75 km h1
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
85 km h1
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
55 km h1
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

## The correct option is B 75 km h−1Given: Speed of first car = 50 km h−1 Time travelled by the first car = 6 h. ∴ Distance between P and Q = 50×6=300 km Now, the second car starts 2 hours after the first car. To reach the point Q at the same time as the first car, the second car should cover the distance between P and Q in the remaining time. Distance to be covered = 300 km Remaining time = 6 - 2 = 4 h Required speed = 3004 = 75 km h−1

Suggest Corrections
0
Related Videos
Average speed
MATHEMATICS
Watch in App
Explore more