Question 278349
A bottleneck due to an accident on a highway produces two lines of cars each having a length of 720 m. If the average distance between cars is 2.5m and the average length of a car is 3.5m , how many cars are there?

A 120  B 122   C 240   D 242

The length of car + gap = 6m

Total length of of the line = 720 m

720/6 = 120 cars in 1 line

so there will be 240 cars in both the lines.