A) 9 sec
B) 15 sec
C) 18 sec
D) 12 sec
Correct Answer: D
Solution :
[d] \[t=\frac{300+200}{\left( 90+60 \right)\times \frac{5}{18}}\] \[=\frac{500\times 18}{150\times 5}=12\,\sec \]You need to login to perform this action.
You will be redirected in
3 sec