Question

15. The length and breadth of
a rectangleare a+b and a-b respectively.If its perimeter is 76, find the value of a.​

Answer 1

Step-by-step explanation:

length =a+b

breadth =a-b

perimeter =76

formula for perimeter of rectangle =2(l+b)

2(l+b)=76

2(a+b+a-b)=76

2(2a)=76

4a=76

a=76÷4

a=19

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Answer 2

Answer:

perimeter = 2*[(a + b)+(a - b)]

76 = 2*2a

76 = 4a

76/4 = a

19 = a

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