Question

The coast of 8 liter of milk and 9 liters of oil is 590 reples. The coast of 2 liters and 3 liters 170 rupees .what is the coast of I liter milk? what is the coast of I liter oil?​

Answer 1

Answer:

Let the cost of 1 litre milk = Rs. x

Cost of 1 litre oil =Rs. y

A/Q1

8x+9y=590------------(1)

A/Q2

2x+3y=170-------------(2)

Multiply eq. (2) by 4

8x+12y=680----------------(3)

eq.(1)-eq.(2)

8x+9y=590

8x+12y=680

- - -

______________

-3y=-90

y=-90/-3

y=30

cost of I litre oil is Rs.30

2x=170-90

x=80/2

x=40

cost of 1 litre milk is Rs.40

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