Question
A train passed two bridges of lengths 800 m and
400 m in 100 seconds and 60 seconds respectively. The length of the train is?Solution
Let the length of the train be x.
According to the question, x + 800/ 100 =
x + 400 / 60 60x
+ 48000 = 100x
+ 40000 48000 - 40000 = 100x - 60x 8000 = 40x x = 200 m Let the length of the train be
According to the question,
+ 800/ 100 =
+ 400 / 60
60
+ 48000 = 100
+ 40000
48000 - 40000 = 100
- 60
8000 = 40
= 200 m
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