Find the whole quantity if:
(i) $25$ % of it is $9$ (ii) $75$ % of it is $15$
(iii) $12$ % of it is Rs. $1080$ (iv) $8$ % of it is $40$ litres.

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Solution

$1) \frac{25 x}{100} = 9 ⟹ x = 36$
$2) \frac{75 x}{100} = 15 ⟹ x = 20$
$3) \frac{12 x}{100} = 1080 ⟹ x =$ Rs. $9000$
$4) \frac{8 x}{100} = 40 ⟹ x = 500$ litres

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Find the whole quantity if

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