Question

How much quantity of tea at the rate of Rs. 90 per kg should be mixed in 28kg of tea at the rate of Rs.72 per kg that the mixture when sold at the rate of Rs. 105 per kg will fetch a profit of 25% ____​

Answer 1

Answer:

Let ‘x’ be the quantity of tea at the rate of ₹90, is required.

Then we have, cost price = x * 90 + 28 * 72

Selling price = (x + 28) * 105

Now (x + 28) * 105 = ( x * 90 + 28 * 72) * 125/100

105x + 2940 = 112.5 x + 28 * 90

7.5x = 420

x = 420/7.5 = 56 kg.