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Addition and Subtraction of Decimals

If a person w...

Question

If a person walks at 14 km/hr instead of 10 km/hr, he would have walked 20 km more. The actual distance travelled by him is:

A

50 km

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B

56 km

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C

70 km

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D

80 km

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Solution

The correct option is A
50 km

Let the actual distance travelled be x km.
$T h e n, \frac{x}{10} = \frac{x + 20}{14} \Rightarrow 14 x = 10 x + 200 \Rightarrow 4 x = 200 \Rightarrow x = 50 k m$ .

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