Question

a car can travel A certain distance in 12 hours at the speed of 56 km by how much should its speed be increased so that it can travel the same distant in 8 hours​

Answer 1

Answer:

84 km/h

Step-by-step explanation:

56×12/8=84

it is correct answer

Answer 2

We will first find out the distnace

Speed = distance/time

    56 = distance/12

distance = 56 × 12

               = 672 km

Now, to cover this distance in 8 hours the speed required will be

Speed = distance/ time

         = 672/8

         = 84 km/hr

The increase in speed = new speed - initial speed

                                      = 84 - 56

                                      = 28 km/hr

So, the speed has to be increased by 28 km/hr