A) 6.75
B) 7.25
C) 5.55
D) 8.35
E) 4.75
Correct Answer: A
Solution :
\[{{v}_{rel}}=45+36=81\,km/h=81\times \frac{5}{18}m/s\] \[{{s}_{rel}}={{v}_{rel}}\times t=81\times \frac{5}{18}\times (5\times 60)\] \[=\frac{81\times 5\times 5\times 60}{18}=6750m=6.75\,km\]You need to login to perform this action.
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