Question

A jar contains $1\frac{1}{2}$ litres of milk. Raj put $\frac{1}{5}$ of the milk in one glass, $\frac{3}{4}$ of the remaining in another glass and $\frac{4}{5}$ of the rest in cup. How much milk is still left in the jar?

• A. 50 ml
• B. 60 ml
• C. 70 ml
• D. 80 ml

Answer 1

The correct option is B 60 ml

We know, 1litre = 1000 ml
Therefore, $1\frac{1}{2}$ litres = $1\frac{1}{2}\times 1000$ = $\frac{3}{2}\times 1000$ = 1500 ml
Amount of milk in the first glass = $\frac{1}{5}\times 1500$ = 300 ml
Remaining milk in the jar = (1500 - 300) ml = 1200 ml
Amount of milk in the second glass = $\frac{3}{4}\times 1200$ = 900 ml
Remaining milk in the jar = (1200 - 900) ml = 300 ml
Amount of milk in the cup = $\frac{4}{5}\times 300$ = 240 ml
Amount of milk left in the jar = (300 - 240) ml = 60 ml