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Formation of Algebraic Expressions

Calculate the...

Question

Calculate the value of $x$ if $90$ of $x$ is $315$ km.

A

3.25

km

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B

3.50

km

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C

4.05

km

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D

3.40

km

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Solution

The correct option is B $3.50$ km
$90$ of $x = 315$ km
$\Rightarrow 90 x = 315$ km
$\Rightarrow x = \frac{315}{90}$ km $= 3.5$ km

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