Question
A train travelling at a speed of 75 mph enters a tunnel \(3^{\frac{1}{2}}\)miles long. The train is\(\frac{1}{4}\)mile
Answer: Option B
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Total distance covered = \(\left(\frac{7}{2}+\frac{1}{4}\right)miles\)
=\(\frac{15}{4}miles.\)
Thairfor Time taken = \(\left(\frac{15}{4\times75}\right)hrs\)
= \(\frac{1}{20}hrs\)
=\(\left(\frac{1}{20}\times60\right)min.\)
= 3 min.
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