3
Q:
A) 25 kmph | B) 24 kmph |
C) 26 kmph | D) 22 kmph |
Answer: B) 24 kmph
Explanation:
Explanation:
Average speed=total distance/total time
Let distance to store be K
then, total time =(K/20)+(K/30)=K/12
and, total time =(2K)
so average speed= 2K / (K/12) = 24kmph.