Question

A car moves at a speed of 60 kms/hr for 15 minutes and then with a speed of 80 kms/hr for next 15 minutes. The total distance covered by the car is
a) 20 kms b) 25 kms c) 48 kms d) 35 kms
kms.
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Answer 1

distance=speed×time

15min =15×(1/60)=0.25hr

Distance covered in first 15 min

=60×0.25

=15 km

Distance covered in second 15 min

=80×0.25

=20 km

Total distance=15 km + 20 km =35 km.

(D) 35 km.

Answer 2

• from the given data,15min=1/4hr. 2.We know that ,, Distance=Speed×time =1/4×60=15km. 3.for the 2nd half, distance travelled=80×1/4=20km...Total Distance travelled=15+20=35kms. Hence , Option(D)35kms is the correct answer.