Two cars A and B leave Delhi at 8:30 a.m. and at 9 a.m. for shimla, respectively. They travel at the speeds of 40km/h and 50 km/h respectively. How many kilometres away from Delhi will the two cars be together?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is Option 4 i.e. 100 km.
| Understanding/Application |
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Distance = speed(time) Distance covered by car A in 30 min = 40(1/2) = 20 km (30 min = 30/60 hr = 1/2 hr) Relative speed of car B = 50 - 40 = 10 km/hr Distance travelled by car B to cover 20 km = 20/10 = 2 hr |
| Distance covered in 2 hr = 50(2) = 100 km |