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2 October, 17:43

The sun of three numbers is 98. If the ratio of the first to second is 2:3 and that of the second to the third is 5:8; then the second number is

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  1. 2 October, 18:03
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    30

    Step-by-step explanation:

    solve the system of equations:

    a+b+c=98,

    a/b=2/3,

    b/c=5/8

    so

    a + 3/2 a + 3/2 * 8/5 a = 98

    49/10 a = 98

    a = 980/49 = 20

    then b = 3/2 * 20 = 30

    (and c = 48)
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