Question

the area of a rectangle is640sq cm .its lenght is 40 cm. find the width and the perimeter​

Answer 1

Answer:

area of rectangle is l×b

640cm² = X×40

X=640/40

x=16cm

perimeter =2(l+b)

2(40+16)

2(56)

112 cm

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Answer 2

Area of rectangle = length * breadth

According to question

640cm^2 = 40cm*breadth

$breadth = \frac{640}{40}$

breadth =16

perimeter of rectangle = 2(L+B)

perimeter = 2(40+16)=112cm