How much Distance Cover by Car?

A car complete a journey in 5 hours. It complete half the distance at 20 kmph and the rest at 30 kmph. The length of the journey is-

  1. 50 km.
  2. 100 km.
  3. 120 km.
  4. 240 km.
Monis Rasool Professor Asked on 24th May 2015 in Maths.
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1 Answer(s)

Answer: (c) 120 km.
Explanation:-
Let be the distance = X km
Time taken = 5 hrs
According to question,  X/2 x 20 + X/2 x 30  = 5                                    (Time = distance/speed)
(3X + 2X) = 5 x 120
5X = 5 x 120
X = 120 km.

Hence, the length of the journey = 120 km.

Anurag Mishra Professor Answered on 24th May 2015.
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