Question

the cost of 5 kg rice and 2 kg wheat is 290 the cost of 3 kg rice and 7 kg wheat is 290 find the cost of 1 kg rice and the cost of 1 kg wheat​

Answer 1

Answer:

Step-by-step explanation

cost of 5 kg rice and 2 kg wheat=290......(1)

cost of  3 kg rice and 7 kg wheat =290........(2)

consider (1)

let cost of 1 kg of rice be =5/x

let the cost of 2 kg of wheat be= 2/y

5/x+2/y=1/290

let 1/x be a and 1/y be b

5a+2b=1/290

290(5a+2b)=1

1450a+580b=1.........(3)

consider (2)

"           "  =3/x

"            "=7/x

7/x+3/x=1/290

let 1/x be a and let 1/y be b

7a+3b=1/290

290(7a+3b)=1

2030a+870b=1...........(4)

multiply (3) with 870

1261500a+504600b=1

multiply (4) with 580

1177400a+504600b=1

by elimination u will obtain the answer