Question

Buses start from a bus terminal with a speed of 20 km/hr at intervals of 10 minutes. What is the speed of a man coming from the opposite direction towards the bus terminal if he meets the buses at intervals of 8 minutes?

• A. 3 km/hr
• B. 4 km/hr
• C. 5 km/hr
• D. 7 km/hr

Answer 1

Answer:

C. 5 km/hr

The distance covered in 10 mins at 20 km/hr = Distance covered in 8 mins at (20 + x) km/hr ⇒ (10 × 20)/60 = {8 × (20 + x)}/60 200 = 8 × (20 + x) ⇒ 200 = 160 + 8x ⇒ 8x = 40 ⇒ x = 5 km/hr.