Question

the ratio of copper and zinc in an alloy is 4:7 if the total weight of the alloy is 7.7kg find the weight of copper and zinc​

Answer 1

${\pink{\bf{Hola!!}}}$

Total weight=7.7 kg

Weight of:-

Copper:Zinc=4:7

To calculate:- weight of Copper(Cu) & Zinc(Zn).

Let their weights be 4x and 7x

4x+7x=Total weight
11x=7.7 kg

x=${\frac{7.7}{11}}$

x=0.7 kg

Weights of

Copper=4x
=4×0.7

${\red{\bf{Copper=2.8\:kg}}}$

Zinc=7x
=7×0.7

${\bf{\purple{Zinc=4.9\:kg}}}$

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Answer 2

sum of both ratio = 11

copper = 4/11 of 7.7 kg

= 4/11 × 7.7

= 2.8 kg

zinc = 7/11×7.7 kg

= 4.9 kg

therefore , copper = 2.8 kg & zinc = 4.9 kg

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