Question

3) The ratio of weights of copper and zinc in brass 7:8 . Find the weight of zinc in brass utensil weighing 225gm.

Answer 1

Answer:

ratio of weights of copper and zinc in brass is 7 : 8 .

Let proportionality constant is x

then, weight of copper = 7x

weight of zinc = 8x

A/C to question,

Given, weight of brass = 225 gm

weight of copper in brass + weight of zinc in brass = 225 gm

=> 7x + 8x = 225

=> 15x = 225

=> x = 15

hence, weight of copper in brass = 7 × 15 = 105 gm

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Answer 2

Answer:

hi friend. mark my answer brainliest

Step-by-step explanation:

copper:zinc= 7:8

let amount of copper and zinc be 7x and 8x respectively

we know,

brass is alloy(a homogenous mixture of copper and zinc)

so,

$7x+8x=225g\\15x=225g\\x=15g$

so, amount of zinc = 8x = (8*15)g = 120g

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