Question

For every 7 cups of mango juice, 3 spoons of sugar is required. If you're going to make 21 cups of mango juice, Calulate the number of spoons of sugar required?

• A. 21
• B. 7
• C. 9
• D. 3

Answer 1

The correct option is C 9

According to the recipe 3 spoons of sugar is added to 7 cups of mango juice.

Ratio of number of cups of mango juice to number of spoons of sugar $=7:3$

For making 21 cups of mango juice, let the spoons of sugar that needs to be added $=\text{x}$

Since the two values must be in proportion ,
$\Rightarrow 7:3::21:x$
$\Rightarrow \frac{7}{3}=\frac{21}{x}$
Upon cross-mulitplication,

$\Rightarrow 7x=21\times 3$
$\Rightarrow x=9$.

9 spoons of sugar is required to make 21 cups of mango juice.