Question

A litre of water is evaporated from $6$ litres of sugar solution containing $4\%$ of sugar. Find the percentage of sugar in the remaining solution?

• A. $4\%$
• B. $5\%$
• C. $4.2\%$
• D. $4.8\%$

Answer 1

The correct option is D $4.8\%$

$6$ Litres of sugar solution contains $4\%$ of sugar.
i.e.$\frac{4}{100}\times 6$ litres of sugar or $0.24$ litres of sugar and $5.76$ litres of water.
if one liter of water is evaporated, then there is $0.24$ litre of sugar in $5$ litres of water.
$\therefore$ Percentage of sugar in the solution
$=(\frac{0.24}{5}\times 100)\%=4.8\%$