Question

5. A train crosses a bridge 180 m long in 20 seconds but it takes 8 seconds to pass
an electric pole. Find the length of the train.
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Answer 1

Answer:

फर्स्ट टेक द लेंथ ऑफ द ट्रेन

if the train will cross the electric pole then it will cover only his distance

then it take at second show the speed equal to X/8

if the train will cross the bridge then it takes Total distance show the total distance equal to X+180

so the equation goes according to the figure and you can get the answer.