A car moves at the speed of 108 km/hr after repairing and moves at the speed of 72 km/hr before repairing. it covers a distance of x km in 3 hours after repairing. How much time will it take to cover a distance of 5x km before repairing ?
Answer & explanation
Correct answer: option 4
Distance = Speed × Time
After repairing , Speed = 108 km/h
Distance covered = 108 × 3 = 324 km
5x = 5 × 324 = 1620 km
Time taken to cover 1620 km before repairing .
Time = \(\frac{Distance }{Speed}\)
= \(\frac{1620 }{72}\)
= 22 hours 30 minutes