5kg sugar and 7kg rice together cost rupees258 while 7kg sugar and 5kg rice together cost rupees246 .Find the total cost of 8kg sugar and 10

Question

5kg sugar and 7kg rice together cost rupees258 while 7kg sugar and 5kg rice together cost rupees246 .Find the total cost of 8kg sugar and 10kg rice

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Remi 1 month 2021-09-17T10:40:23+00:00 2 Answers 0 views 0

Answers ( )

    0
    2021-09-17T10:42:10+00:00

    Answer: (________)

    Step-by-step explanation: (___________)

    0
    2021-09-17T10:42:19+00:00

    Answer:

    384 rs

    Step-by-step explanation:

    let cost of rice be r

    let cost of sugar be s

    5s + 7r =258

    7s + 5r =246

    (5s + 7r =258)*7 = 35s+49r=1806

    (7s + 5r =246)*5 =35s+25r=1230

    35s+49r-35s-25r=1806-1230

    (24r = 576)/24

    r=24

    7s + 5r =246

    7s=246-5*24

    7s=246-120

    s=126/7

    s=18

    therefore 8s+10r=8*18+10*24=384

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