Walking (6/7)th of his usual speed, a man is 12 minutes too late.

The usual time taken by him to cover that distance is:

** Option:**

**A.**1 hr 12 min

**B.**1 hour

**C.**1 hr 20 min

**D.**1 hr 15 min

**Answer: A . 1 hr 12 min**

** Justification:**

New speed = (6/7) of usual speed.

New time = (7/6) of usual time.

Therefore (7/6 of usual time)- (usual time) = (1/5) hr.

=> (1/6 of usual time)= (1/5) hr

=> usual time = (6/5) hr

= **1 hr 12 min.**