A) \[43\frac{1}{2}\,km\,hr\]
B) \[38\frac{2}{3}\,km\,hr\]
C) \[39\,\,km\,hr\]
D) \[42\,\,km\,hr\]
Correct Answer: B
Solution :
Average speed \[=\frac{2xy}{x+y}\] \[=\,\,\,\,\frac{2\times 58\times 29}{58+29}=\frac{3364}{87}=\,\underline{\,\mathbf{38}\frac{\mathbf{2}}{\mathbf{3}}\mathbf{km}\mathbf{./hr}\mathbf{.}}\]You need to login to perform this action.
You will be redirected in
3 sec