A) 9 km/h
B) 4.5 km/h
C) 4 km/h
D) 3 km/h
Correct Answer: C
Solution :
[c] Average speed \[=\frac{2xy}{(x+y)}km/h\] \[=\frac{2\times 6\times 3}{(6+3)}km/h=4\,km/h\] |
You need to login to perform this action.
You will be redirected in
3 sec