A milkman mixed some water with milk to gain 25% by selling the mixture at the cost price. The ratio of water and milk is respectively –

A. 5 : 4 B. 4 : 5 C. 1 : 5 D. 1 : 4 Answer: Option D

Solution(By Apex Team)

Cost price of 1 litres of milk = Rs. 100 ∴ Mixture sold for Rs. 125 $=\Large\frac{125}{100}=\frac{5}{4}$ \begin{aligned}&\text{∴ Quantity of mixture =}\frac{5}{4}\ \text{litres}\\ &\text{∴ Quantity of milk = 1 litre}\\ &\text{∴ Quantity of water = }\frac{5}{4}-1=\frac{1}{4}\text{litre}\\ &\text{∴ Required ratio =}\frac{1}{4}\ :\ 1=1\ :\ 4\end{aligned}

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