Question

the area of a rectangular piece of cardboard is 36 square metre and its length is 9 metre what is the width of a cardboard​

Answer 1

Area of cardboard=area of rectangle

area of rectangle= wl

therefore 36= 9× w

36/9=w

w=4

Answer 2

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$\huge{\underline{\underline{\sf{\blue{SOLUTION:-}}}}}$

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$\sf{\underline{\green{AnswEr:-}}}$

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• The width of the rectangular cardboard = 4 cm

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$\sf{\underline{\green{Given:-}}}$

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• The area of a rectangular piece of cardboard is 36 sq Cm and its length is 9 Cm.

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$\sf{\underline{\green{Find:-}}}$

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• The width of the rectangular cardboard = ?

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$\sf{\underline{\green{Explanation:-}}}$

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$\sf{\underline\purple{Formula\:Used\:Here:-}}$

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$\bigstar\boxed{\sf{\red{Area\:of\:the\: rectangle = Length \times Width}}}$

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$\sf{\underline\purple{So:-}}$⠀⠀

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$\bigstar\boxed{\sf{\red{Width = \dfrac{Area}{Length}}}}$

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$\sf{\underline{\pink{Putting\:the\:values:-}}}$

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$\longrightarrow \sf {Width = \cancel\dfrac{36}{9} }$

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$\longrightarrow{\underline{\boxed{\sf{Width = 4\:Cm}}}}$

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$\:\:\:\:\dag\bf{\underline{\underline \red{Hence:-}}}$

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• The width of the rectangular cardboard is 4 cm

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$\rule{200}{2}$