a) 225 meters
b) 240 meters
c) 230 meters
d) 235 meters
Answer: b
Explanation: Speed = $$\left( {54 \times \frac{5}{{18}}} \right)$$ m/sec = 15 m/sec
Length of the train = (15 × 20) m = 300 m
Let the length of the platform be x meters
Then, $$\frac{{{\text{x}} + 300}}{{36}}$$ = 15
x + 300 = 540
x = 240 meters
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