Question
380 ml of a mixture contains milk and water in the ratio
of 9 respectively. If 60 ml of water and 70 ml of milk are added into it, then the ratio of milk to water in the resulting mixture will be 7:2. Find the value of ‘u’.Solution
ATQ Quantity of milk in 380 ml of mixture = 380 × 9/(9 + u) Quantity of water in 380 ml of mixture = 380 × u/(u + 9) According to the question: {3420/(9 + u) + 70}/{380u/(u + 9) + 60} = 7/2 Or, 3420/(9 + u) + 70 = 1330u/(u + 9) + 210 Or, (3420 – 1330u)/(u + 9) = 140 Or, 3420 – 1330u = 140u + 1260 Or, 1470u = 2160 Or, u = 2
In school D, total number of children who didn’t used any of the stationary items are 115 and the ratio of girls who used the stationary items to that...
What is the cost of flooring of P?
What is the total number of male employees in the company?
If Rs. P is invested for T years at 20% interest compounded annually. Interest earned is 10560. The difference of principal and interest is 56% of princ...
What is the average number of bags sold by A, B and C?
A shopkeeper bought 120 kg of sugar at ₹40 per kg and 150 kg at ₹30 per kg. If he sells the entire quantity at ₹45 per kg, what is his total profit?
If the average number of unsold items by company 'B' and 'D', together, who were presented in a competition is 'a', then find the value of 90% of 'a'.
Study the information given below and answer the following questions.
The line graph below repres...
What is the difference between the total number of laptops in computer world and the number of i5 processor laptops in Arora computers?
If 20 per cent of the number of participants of drama competition has been shortlisted for the next level of completion, then what is the number of shor...
Relevant for Exams:
