Question

A Bus was moving with a speed of 30 km per hour and car was moving with a speed of 40 km per hour. If after 4 hours car was able to move ahead of bus, by how much distance was the car behind the bus at the start?

• A. 30 km
• B. 50 km
• C. 40 km
• D. 60 km

Answer 1

The correct option is C 40 km

Speed of bus = 30 km per hour
Speed of car = 40 km per hour

Total distance covered by car in 1 hour
= 40 km

Total distance covered by car in 4 hour
= 40 $\times$ 4
= 160 km

Total distance covered by bus in 1 hour
= 30 km

Total distance covered by bus in 4 hour
= 30 $\times$ 4
= 120 km




Since Car move ahead of bus after 4 hours therefore,


Total distance covered by car in 4 hours
= Total distance covered by bus in 4 hours + Distance between car and bus at start.


Distance between car and bus at start
= 160 km - 120 km
= 40 km