A train moving at a speed of 60 kmph crosses a tunnel of length 100 m, whereas another train of same length moving at 80 kmph crosses a tunnel of length 160 m in the same time. Find the length of the first train.

80 m

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70 m

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60 m

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50 m

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90 m

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Solution

The correct option is A
80 m

Let the length of the train be `l' m

$\frac{100 + l}{60} = \frac{160 + l}{80}$

$∴$ l = 80 m

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A train moving at a speed of 60 kmph crosses a tunnel of length 100 m, whereas another train of same length moving at 80 kmph crosses a tunnel of length 160 m in the same time. Find the length of the first train.

The correct option is A 80 m Let the length of the train be `l' m 100+l60=160+l80 ∴ l = 80 m

The correct option is A
80 m

Let the length of the train be `l' m

$\frac{100 + l}{60} = \frac{160 + l}{80}$

$∴$ l = 80 m