Question

How many kilograms of rice at rupees 50 per kilogram should be mixed with 10 kilograms of rice at rupees 80 per kilogram to get a mixture of rupees 70 per kilogram​

Answer 1

Answer:

Consider the amount of kg that costs Rs.48 per kg as X

Mixture selling/kg = Rs.77.50

Mixture cost/kg= 77.50 * 100/125

= Rs.62

X * 48 + 49 * 74 = (X + 49) * 62

48X + 49 * 74 = 62X + 49 * 62

14X = 49 * 12

X = 42

one more method

125% = 77.50

100% = cost = 4/5 X 77.50 = Rs 62 per kg

Let the quantity mixed be x Kg

Total cost = 48x + 49*74 = 48x + 3626 = 62 ( x+49)

48x +3626 = 62x + 3038

14x = 588

x = 42 kg ANSWER