Question

Given P = 2 (l + b) when l = 15 and P = 50,
find b

Answer 1

b = 10

Explanation:

P = 2 (l + b)

l = 15

P = 50

Substitute

50 = 2 (15 + b)

multiply

50 = 30 + 2b

subtract

20 = 2b

divide

b = 10

Answer 2

Given:-

P = 2 (l + b) when l = 15 and P = 50

To Find:-

To find b

Solution:-

P = 2 (l + b) [Given]

Putting the value of P = 50 and l = 15 we get,

50 = 2(15 + b)

`(50)/(2)` = 15 + b

25 = 15 + b

25 - 15 = b

10 = b

So, b = 10

Value of b is 10. [Answer]