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Question

A metal pipe 3m long was found to weight 7.6kg. What would be the weight of the same kind of 7.8m long pipe?

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Solution

Given, the weight of 3m long pipe = 7.6kg

Using unitary method in which first we find the value of one unit and then the value of the required number of units.
Weight of 1m long pipe = 7.63kg
Weight of 7.8m long pipe = 7.63×7.8
= 19.76kg
Hence, the weight of 7.8m long pipe is 19.76kg.


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