Question

a car moves with a speed of 40km/h for 15 minutes and then the speed of 60km /h for 15 minutes the total covered by the car​

Answer 1

Answer:

For First Speed or First interval:

• Speed , V' = 40 Km/h
• Time,  t' = 15 minutes = 15/60 = 1/4 hrs

we have to calculate the distance , s'  ,

        => V' * t' = s'

        => 40 * 1/4 = 10 Km

For Second Speed or Second interval:

• Speed, V  =  60 Km/h
• Time ,  t =  15 minutes = 15/60 = 1/4 hrs

We have to calculate the distance , s

         => V * t  = s

         =>  60 *  1/4 = 15 Km

Total distance covered by the car is 15 Km + 10 Km = 25 Km  (Ans.)

                                      Hope it helps

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