a) 5 sec
b) 6 sec
c) 7 sec
d) 10 sec
Answer: b
Explanation:
$$\eqalign{
& {\text{Speed of train relative to man}} \cr
& {\text{ = }}\left( {60 + 6} \right){\text{km/hr}} \cr
& = 66\,{\text{km/hr}} \cr
& = \left( {66 \times \frac{5}{{18}}} \right)m/\sec \cr
& = \left( {\frac{{55}}{3}} \right)m/\sec \cr
& {\text{Time taken to pass the man}} = \left( {110 \times \frac{3}{{55}}} \right)\sec \cr
& = 6\,\sec \cr} $$
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