Question : You drive a car at seed of 70 km/h in a straight road for 8.4 km ,and then the car runs out of petrol. You walk for 30 min to reach a petrol pump at a distance of 2 km .The average velocity from the beginning of your drive till you reach the petrol pump is
(a) 16.8 km/h
(b) 35 km/h
(c) 64 km/h
(d) 18.6 km/h
Answer : The Right option is (a)
Solution :
