Question

A car moves with a speed of 40 km per hour in 15 min and then with a speed of 60 km per hour the next 15 minutes . The total distance covered by car is 25 kms. 15 kms. 10 kms.

Answer 1

40/60 (of an hour) x 30 k/hr = 20 km

50/60 x 60=50 km

1 x 30 =30 km

add those together and you went 100km

40 min+50min+60min = 150 min = 150/60 hr

velocity = distance/time = 100/(150/60)= 100 x 60/150 =6000/150 = 40 km/hr