Question

A cyclist was moving with a speed 20 km/hr. Behind the cyclist at a distance of 100 km was a biker moving in the same direction with a speed of 40km/hr. After what time will the biker over take the cyclist?

• A. 2.5 hr
• B. 4 hr
• C. 5 hr
• D. 6 hr

Answer 1

Answer:

C. 5 hr

Solution: Given: Speed of cyclist = 20 km/hr Distance between cyclist and biker = 100 km Speed of biker = 40 km/hr Formula: Time = Distance undefined Speed Solution: Relative speed = Biker speed - Cyclist speed = 40 - 20 = 20 km/hr Distance ÷ Relative speed = 100 ÷ 20 = 5 hours Therefore, the biker will overtake the cyclist after 5 hours.