The age of a man is $\frac{2}{5}$ th of the age of a tree in his housing complex. The tree is 90 years old. If the man's age multiplied by a number $x$ equals 180, find $x$ .

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Solution

The correct option is B
5

Given : Age of the tree = 90 years

$∴$ Man's age = $\frac{2}{5} \times 90 = 36 y e a r s$

36 $\times x = 180$ (given)

$\Rightarrow x = \frac{180}{36} = 5$

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Standard VII Mathematics

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The age of a man is 25th of the age of a tree in his housing complex. The tree is 90 years old. If the man's age multiplied by a number x equals 180, find x.

The correct option is B 5 Given : Age of the tree = 90 years ∴ Man's age = 25×90=36 years 36 × x=180 (given) ⇒x=18036=5

The age of a man is $\frac{2}{5}$ th of the age of a tree in his housing complex. The tree is 90 years old. If the man's age multiplied by a number $x$ equals 180, find $x$ .

The correct option is B
5

Given : Age of the tree = 90 years

$∴$ Man's age = $\frac{2}{5} \times 90 = 36 y e a r s$

36 $\times x = 180$ (given)

$\Rightarrow x = \frac{180}{36} = 5$