Question

A man travels 50 km at speed 25 km/h and next 40 km at 20 km/ h and there after travels 90 km at 15 km/h. His average speed is :

• A. 18 kmph.
• B. 20 kmph.
• C. 25 kmph.
• D. 15 kmph.

Answer 1

Answer:

A. 18 kmph.

A man travels 50 km at 25 kmph Time taken to travel 50 km = 50/25 = 2 hours Next 40 km at 20 kmph Time taken to travel 40 km = 40/20 = 2 hours 90 km at 15 kmph Time taken to travel 90 km = 90/15 = 6 hours Total distance = 180 km Total time = 10 hour Average speed = 180/10 = 18 km/hr