The Speed of The Truck must be Increased by :

A truck can finish a certain journey in 10 hours at a speed of 48 km/h. In order to cover same distance in 8 hours, the speed of the truck must be increased by

  1. 6 km/h
  2. 7.5 km/h
  3. 12 km/h
  4. 15 km/h
Anurag Mishra Professor Asked on 12th October 2015 in Maths.
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1 Answer(s)

Answer: (3) 12 km/h

Explanation:-
A truck can finish a certain journey in 10 hours at a speed of 48 km/h.
Then, the total distance covered by truck = 48 x 10
= 480 km

In a order to cover same distance in 8 hours,
Then, the speed of truck = 480/8
= 60 km/h

Then, the speed of the truck must be increased by = 60 – 48
= 12 km/h

Hence. the answer is (3) 12 km/h.

Anurag Mishra Professor Answered on 14th October 2015.
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