The perimeter of a rectangle is 14 8 15 cm . If its length is 4 2 3 cm , find its area.

Given length of a rectangle l = 4 2 3 cm Let the breadth of the rectangle is b cm . We know that perimeter of the rectangle is 2 l + b Given perimeter of the rectangle is 14 8 15 cm . ⇒ 2 l + b = 14 8 15 ⇒ 2 4 2 3 + b = 14 8 15 ⇒ 2 4 × 3 + 2 3 + b = 14 × 15 + 8 15 ⇒ 2 12 + 2 3 + b = 210 + 8 15 ⇒ 2 14 3 + b = 218 15 ⇒ 14 3 + b = 218 5 × 1 2 ⇒ b = 218 30 - 14 3 ⇒ b = 218 - 140 30 ⇒ b = 78 30 ⇒ b = 13 5 = 2 3 5 cm We know that area of the rectangle is l × b . ⇒ 4 2 3 × 13 5 ⇒ 4 × 3 + 2 3 × 13 5 ⇒ 14 3 × 13 5 ⇒ 182 15 cm 2 = 12 2 15 cm 2 Hence, the area of the rectangle is 12 2 15 cm 2

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Find the perimeter of the given figure, if the perimeter of the figure is in $k cm$ , then find the value of $'k'$ ?

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Find the perimeter of the given figure, if the perimeter of the figure is in k cm, then find the value of 'k'?

Important Questions on Perimeter and Area

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Find the perimeter of the given figure, if the perimeter of the figure is in $k cm$ , then find the value of $'k'$ ?