find the perimeter of rectangle having sides (3x+2y)cm and (7y)cm
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3x+2y×7y
21x+14y^2
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Given:-
Length (l ) = (3x+2y)cm
Breath (b) = 7y cm
The perimeter of rectangle= 2( l + b )
= 2(3x+ 2y + 7y)
= 2(3x+ 9y)
= 2×3(x+ 3y)
= 6(x+ 3y)cm Ans
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