A metal pipe 3 metre long was found to weigh 7.6kg. What would be the weight of the same kind of 7.8m long pipe?
Weight of 3 meter long pipe = 7.6 kg
Weight of 1 meter pipe = 
kg
Weight of 7.8 meter long pipe = 
kg
Hence, weight of 7.8m long pipe will 19.76 kg
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