Question

# A car moves with a speed of 40 km/h for 15 minutes and then with a speed of 60 km/h for the next 15 minutes. The total distance covered by the car is :

A
35
B
25
C
45
D
66

Solution

## The correct option is B 25Speed of car in first 15 minutes = 40 km/hDistance covered = speed $$\times$$ Time taken60 minutes = 1 hour15 minutes = $$\dfrac{15}{60}$$ hourDistance covered = $$240\times \dfrac{15}{60}=10 km$$Speed of car in next 15 minutes = 60 km/hDistance covered = $$60\times \dfrac{15}{60}=15 km$$$$\therefore$$ Total distance covered = (10+15)km = 25 km$$\therefore$$ 25 km is correctPhysics

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