Question

if the cost of 20 kg wheat is Rs 525 find the cost of 7 kg​

Answer 1

Answer:

Let the cost of 1 kg of rice and wheat be x & y respectively.

given that 3x+4y=93 -(i)

5x+7y=159 -(ii)

(i)×5−(ii)×3

−y=−12y=12

3a+4y=933x=93−4(12)=93−48=45x=5

∴ cost of rice =15 Rs.

cost of wheat =12Rs. per kg

Answer 2

Answer:

Cost of 20 kg wheat=₹525

Cost of 1kg wheat=₹525÷20=₹26.25

Cost of 7kg of wheat=₹26.25×7

=₹183.75

Step-by-step explanation:

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