Question

Mohan takes 2 hours more than Kishore to walk 63 km. If Mohan increases his speed by 50%, then he can make it in 1 hour less than Kishore. How much time does Kishore take to walk 63 km?

• A. 7 hours
• B. 6 hours
• C. 9 hours
• D. 5 hours

Answer 1

Answer:

C. 9 hours

Let the speed of Mohan be 2x km/h. New speed = 3x km/h Initial time = t + 2 Final time = t - 1 Distance = (3x × 2x)/(3x - 2x) × (t + 2 - t + 1) 63 = 6x × (3) x = 3.5 Speed of Mohan = 2x = 7 km/h Time taken by Mohan = 63/7 = 9 hours Time taken by Kishore = 9 - 2 = 7 hours