Question

the ratio of the length of a school ground to its width is 5 : 2 find its length if the width is 40 metres. ​

Answer 1

The ratio of length and width

=5:2

And width =40m

Given

So 2 ratio=40m

1 ratio =40/2=20m

Then Length =20x5=100m

This is ur ans hope it will help you in case of any doubt comment below

Answer 2

Given: The ratio of the length of a school ground to its width is 5:2.

Need to find: Length of the school ground.

❒ Let the length and width of the school ground be 5x and 2x respectively.

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$\underline{\boldsymbol{According\: to \:the\: Question :}}$

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The width of the school ground is 40 m.

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Therefore,⠀

$:\implies\sf 2x = 40 \\\\\\:\implies\sf x = \cancel\dfrac{40}{2} \\\\\\:\implies{\underline{\boxed{\sf{x = 20}}}}$⠀

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Now,

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★ Length of the school ground is,

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$:\implies\sf Length = 5x \\\\\\:\implies\sf 5 \times 20 \\\\\\:\implies{\underline{\boxed{\sf{Length = 100\;m}}}}$

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$\therefore{\underline{\sf{Hence,\: length\; of\;the\: school\; ground\;is\; \bf{100\;m }.}}}$