Multiple choice

Ranjeet drives his car at an average speed of 50 km/hr and reaches his destination in 8 hours. Rahman covers the same distance in 5 hours. If Ranjeet increases his speed by 10 km/hr and Rahman increases his speed by 20 km/hr, then what will be the difference in time taken by them to reach their destination?

  1. 2 hours 30 minutes

  2. 3 hours 40 minutes

  3. 3 hours 20 minutes

  4. 2 hours 40 minutes
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Distance = 50 * 8 = 400 km. Rahman's speed = 400 / 5 = 80 km/hr. New speeds: Ranjeet = 60, Rahman = 100. New times: Ranjeet = 400/60 = 6.66 hr (6 hr 40 min), Rahman = 400/100 = 4 hr. Difference = 2 hr 40 min.

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