A car taken 5 hours to cover a distance of 300 kms.

How much should the speed in km/hour be maintained to cover the same distance in 4/5th of the previous time ?

** Option:**

**A.**48 km/hour

**B.**120 km/hour

**C.**60 km/hour

**D.**75 km/hour

**Answer: D . 75 km/hour**

** Justification:**

1st case :

Time taken by car to cover 300 km = 5 hours.

Speed of the car = 300/5 = 60 km/hour.

2nd case :

Time desired to cover the same distance of 300 km = 4 hours.

Required speed = 300/4 = 75 km/hour.