# clock takes 8mins for 1round so in 18mins how many round it takes???

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1
Feb 8, 2018

color(purple)(2(1/4) rounds or $\textcolor{p u r p \le}{2.25} r o u n \mathrm{ds}$

#### Explanation:

In 8 minutes -> 1 round

In 18 minutes -> (18/8) * 1 rounds

$\implies \frac{18}{8} = \frac{3 \cdot 3 \cdot \cancel{2}}{2 \cdot 2 \cdot \cancel{2}} = \frac{9}{4} = 2 \left(\frac{1}{4}\right) r o u n \mathrm{ds}$

$\implies 2 \left(\frac{1 \cdot {\cancel{100}}^{25}}{\cancel{4} \cdot 100}\right) = 2 \left(\frac{25}{100}\right) = 2.25 r o u n \mathrm{ds}$

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Kashish Share
Feb 8, 2018

2.25 rounds

#### Explanation:

This question can be easily solved by applying unitary method.

No. of rounds made by the clock in 8 minutes = $1$

No. of rounds made by the clock in 1 minute = $\frac{1}{8}$
No. of rounds made by the clock in 18 minutes = $\frac{1}{8}$ x $18$ = 2.25

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