Question

A person takes 40 minutes more than his usual time when he covers a distance of 20 km at 5 km/h. If he covers the same distance at 8 km/h, he takes x minutes less than the usual time. What is the value of x?

• A. 48
• B. 54
• C. 45
• D. 50

Answer 1

Answer:

D. 50

Speed of man = 5 km/h Time = Distance/Speed = 20/5 = 4 hr Usual time = 4 hr – 40 min = 3 hr and 20 min Speed of man = 8 km/hr Time = Distance /Speed = 20/8 = 2 hr 30 min Time difference = (3 hr + 20 min) – (2 hr + 30 min) = 50 min