A car starts from point A towards point B, travelling at the speed of 20 km/h. hours later another car starts from point A and travelling at the speed of 30 km h and reaches hours before the first car. Find the distance between A and B.
Show answer & explanation
Correct answer: B
Explanation
The correct answer is Option 2 i.e. 240 km.
Formula used:
Distance = [(S1 × S2)/(S1 - S2)] × total time ---- (1)
Calculations:
S1 = 20 and S2 = 30
Total time = 2.5(early) + 1.5(late) = 4 h
Using equation (1), we get
⇒ Distance = [(30 × 20)/10] × 4
⇒ Distance = 240 km