Question

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

Answer 1

Answer:

38

Step-by-step explanation:

2(l+b)=76

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

[+b-b=0]

2a=76

a=76÷2

à=38

Answer 2

Length = a + b

Length = a + bBreadth = a - b

Length = a + bBreadth = a - bPerimeter = 2 (l + b)

Length = a + bBreadth = a - bPerimeter = 2 (l + b) P = 76

Length = a + bBreadth = a - bPerimeter = 2 (l + b) P = 76 2 (l + b) = 76

Length = a + bBreadth = a - bPerimeter = 2 (l + b) P = 76 2 (l + b) = 762 [(a+b)+(a-b)] = 76

Length = a + bBreadth = a - bPerimeter = 2 (l + b) P = 76 2 (l + b) = 762 [(a+b)+(a-b)] = 762 (a+b+a-b) = 76

Length = a + bBreadth = a - bPerimeter = 2 (l + b) P = 76 2 (l + b) = 762 [(a+b)+(a-b)] = 762 (a+b+a-b) = 762 (2a) = 76

Length = a + bBreadth = a - bPerimeter = 2 (l + b) P = 76 2 (l + b) = 762 [(a+b)+(a-b)] = 762 (a+b+a-b) = 762 (2a) = 764a=76

Length = a + bBreadth = a - bPerimeter = 2 (l + b) P = 76 2 (l + b) = 762 [(a+b)+(a-b)] = 762 (a+b+a-b) = 762 (2a) = 764a=76a=76÷4

Length = a + bBreadth = a - bPerimeter = 2 (l + b) P = 76 2 (l + b) = 762 [(a+b)+(a-b)] = 762 (a+b+a-b) = 762 (2a) = 764a=76a=76÷4a=19

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