Question

Uma has $4\frac{2}{5}$ litres of milk and Shama has $3\frac{1}{10}$ litres of milk. How many litres of milk do they have in all?

• A. $7\frac{1}{2}l$
• B. $7\frac{3}{10}l$
• C. $5\frac{1}{2}l$
• D. $6\frac{1}{2}l$

Answer 1

The correct option is A $7\frac{1}{2}l$

Quantity of milk Uma has
$=4\frac{2}{5}=\frac{(5\times 4)+2}{5}=\frac{22}{5}$ $l$

Quantity of milk Shama has
$=3\frac{1}{10}=\frac{(10\times 3)+1}{10}=\frac{31}{10}$ $l$

Total quantity of milk
$=\frac{22}{5}+\frac{31}{10}=\frac{44+31}{10}=\frac{75}{10}=\frac{15}{2}=7\frac{1}{2}l$

Therefore, they have $7\frac{1}{2}$ $l$ of milk in total.