Question

The ratio of copper and zinc in an alloy is 5:3. If the weight of the copper

in the alloy is 30.5 grams, find the weight of zinc in the alloy.​

Answer 1

Answer:

Correct option is

A

18.3g.

Given the ratio of copper and zinc in an alloy is 5:3.

Let weight of copper and zinc be 5x and 3x.

Then according to the problem we have,

5x=30.5

or, x=6.1

Then weight of zinc is 3×6.1=18.3 g

Answer 2

Answer:

18.3 g

Step-by-step explanation:

copper : zinc = 5:3

Let the common factor be x

∴ 5x : 3x

We know that 5x is equal to x

∴ 5x = 30.5 g

  x   =  30.5 ÷ 5 g

    x = 6.1 g

∴weight of zinc = 3x

                           = 3 × 6.1 g

                           = 18.3 g