Question

The ratio of tin and zinc in an alloy is 3:4. In 21 kg of alloy, find the quantity of tin and zinc in alloy.

Answer 1

Let $\frac{T}{Z}=\frac{3}{4}$

$T=$ No. of kgs of Tin in alloy

$Z=$ No. of kgs of zinc in alloy

$T+Z=21$ kg

$\frac{3Z}{4}+Z=21$

$\Rightarrow \frac{7Z}{4}=21$
$\Rightarrow z=21\times \frac{4}{7}$

$\Rightarrow Z=12$kg

$\Rightarrow T=\frac{3}{4}\times 12=9$kg

Quantity of Tin in alloy$=9$kg

Quantity of zinc in alloy$=12$kg.