a) 200 meters
b) 250 meters
c) 300 meters
d) 350 meters
Answer: b
Explanation: Speed = $$\left( {30 \times \frac{5}{{18}}} \right)$$ m/sec = $$\frac{{25}}{3}$$ m/sec
Time = 36 second
Let the length of the bridge be x meters.
Then, $$\frac{{50 + {\text{x}}}}{{36}}$$ = $$\frac{{25}}{3}$$
3(50 + x) = 900
50 + x = 300
x = 250 meters
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