Question

the length a rectangular postcard is 10cm and its breadth is 7cm find the perimeter of the postcard​

Answer 1

Answer:

Length of a rectangular postcard = 10cm

Breadth of a rectangular postcard= 7cm

Perimeter of the postcard= 2×(Length+breadth)

=2×(10+7)

Perimeter=2×17

=34

Answer 2

Given: The length a rectangular postcard is 10cm and its breadth is 7cm.

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Need to find: The perimeter of postcard?

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We know that, if we are given with the length of rectangle & breadth of rectangle, we have the required formula, that is,

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$\sf{:\implies Perimeter_{(rectangle)} = 2(l + b)}$

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⠀⠀⠀ Here l is the length of rectangle & b is the breadth of rectangle, And here in this question we have l = 10cm & b = 7cm.

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By using the required formula and substituting all the given values in the formula, we get:

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$\sf{:\implies Perimeter_{(rectangle)} = 2(10 + 7)} \\ \\ \\ \sf{:\implies Perimeter_{(rectangle)} = 2(17)} \\ \\ \\ \sf:\implies \underset{\blue{\sf \mathcal{R}equired\ \mathcal{A}nswer}}{\underbrace{\boxed{\pink{\frak{ Perimeter_{(rectangle)} = 34}}}}}$

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$\sf{\therefore \underline{The \; perimeter \; of \; rectangle \; is \: \textsf{\textbf{34cm.}}}}$