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Mathematics

Grade6

Easy

Question

Sophia bought 12.75 liters of milk for $ 51.15. Find the cost of 10 liters of milk.

$41
$40.11
$41.11
$400.1

hint Hint:

The unitary method is a fundamental concept of Mathematics and makes it convenient to solve various sums. This method generally involves finding the value of a unit in the given terms, using which the value of the given quantity of units can be calculated.

The correct answer is: $41.11

Cost of 12.75 liters of milk = $51.15
Cost of one liter of milk $equals $ fraction numerator 51.15 over denominator 12.75 end fraction$
$equals $ open parentheses fraction numerator 51.15 over denominator 12.75 end fraction cross times fraction numerator 100 over denominator 100 end fraction close parentheses equals $ fraction numerator 5115 over denominator 1275 end fraction$
= $4.01
Cost of 10 liters of milk = $$ 4.011 cross times 10 equals $ 40.11$

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