Question

6.
The ratio of copper and aluminium in an alloy is 3:5.
If the weight of copper is 12.8 kg in the alloy, find the
weight of aluminium in the alloy.​

Answer 1

Answer:

8 kg is the weight of aluminum in the alloy

Answer 2

Given:

weight of copper in and alloy of copper and aluminium is 12.8

Let the ratio be x so ratio = 3x and 5x

weight of copper ( 3x ) = 12.8 gm

so,

$x = \frac{12.8}{3 } \\ x = 4.266$

$weight \: of \: aluminium \: is \: 5x \\ so \: 5 \: \: \times \: x \\ 5 \: \: \: \times 4.266 \\ = 21.33 \: kg \:$