A milkman makes 20% profit by selling milk mixed with water at Rs. 9 per litre, if the cost price of 1 litre pure milk is Rs. 10, then the ratio of milk and water in the said mixture is = ?
A. 3 : 1
B. 4 : 1
C. 3 : 2
D. 4 : 3
Answer: Option A
Solution(By Examveda Team)
According to question,S.P. at 20% profit = Rs. 9/litres
Cost of mixture $$ = \frac{9}{{120}} \times 100 = {\text{Rs}}{\text{.}}\,7.5/{\text{litre}}$$
Now, let the ratio of milk and water in the mixture = x : y
$$\eqalign{ & \Rightarrow \frac{{\left( {10 \times x} \right) + \left( {0 \times y} \right)}}{{x + y}} = 7.5 \cr & \Rightarrow 10x = 7.5\left( {x + y} \right) \cr & \Rightarrow x:y = 3:1 \cr} $$
Related Questions on Profit and Loss
A. 45 : 56
B. 45 : 51
C. 47 : 56
D. 47 : 51
A. Rs. 2600
B. Rs. 2700
C. Rs. 2800
D. Rs. 3000
A. A neither losses nor gains
B. A makes a profit of 11%
C. A makes a profit of 20%
D. B loses 20%
A. Rs. 3,750
B. Rs. 3,250
C. Rs. 2,750
D. Rs. 2,250
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