The milk and water in a mixture are in the ratio 7 : 5. When 15 litres of water are added to it. The ratio of milk and water in the new mixture becomes 7 : 8. The total quantity of water in the new mixture is.

A. 35 litres B. 40 litres C. 60 litres D. 96 litres Answer: Option B

Solution(By Apex Team)

$\begin{array}{l}\text{According to the question,}\\ \begin{array}{l} \text { Milk : Water }\\ \left.\begin{array}{lll} 7 & : & 5 \\ 7 & : & 8 \end{array}\right) 3 \text { unit } \end{array}\end{array}$ ∴ Remember water is added and not milk, so make milk equal but here milk is already equal $\begin{array}{l} 3 \text { units }=15 \text { litres } \\ 1 \text { unit }=5 \text { litres } \\ 8 \text { units }=40 \text { litres } \end{array}$ Total quantity of water in the new mixture = 40 litres

Related Questions On Alligation

A. 2 : 5
B. 3 : 5
C. 5 : 3
D. 5 : 2

An alloy contains zinc, copper and tin in the ratio 2 : 3 : 1 and another contains copper, tin and lead in the ratio 5 : 4 : 3. If equal weights of both alloys are melted together to form a third alloy, then the weight of lead per kg in new alloy will be:

A. $\large\frac{1}{2} \mathrm{~kg}$
B. $\large\frac{1}{8} \mathrm{~kg}$
C. $\large\frac{3}{14} \mathrm{~kg}$
D. $\large\frac{7}{9} \mathrm{~kg}$

A. 81 litres
B. 71 litres
C. 56 litres
D. 50 litres