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Maths-

General

Easy

Question

$1 fourth$ litre of milk cost Rs $15 over 2$ . Find the cost of $9 over 2$ litre of milk.

Rs 125
Rs 135
Rs 145
Rs 130

The correct answer is: Rs 135

Rs 135
Cost of $1 fourth$ litre milk= Rs $15 over 2$
Cost of 1 litre milk =Rs $fraction numerator left parenthesis 15 divided by 2 right parenthesis over denominator left parenthesis 1 divided by 4 right parenthesis end fraction$
=Rs $left parenthesis 15 over 2 cross times 4 over 1 right parenthesis$
= Rs 30
Cost of $9 over 2$ litre of milk =30 × $9 over 2$
= $fraction numerator left parenthesis 30 cross times 9 right parenthesis over denominator 2 end fraction$
= Rs 135

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