Of the three numbers, the first is twice the second and the second is twice the third. The average of the reciprocal of the numbers is `7/72. The numbers are :
Let the number be `x`. Then ,second number= `2x` Firt number = `4x`
`:.` `1/x + (1)/(2x) + (1)/(4x)` = `(7/72 xx 3)` or `(7)/(4x) = 7/24` or `4x` = 24 or `x` = 6
So the numbers are 24, 12 and 6.
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