Question

Rearrange the formula P = 2(l + b) for b.

A)b = (P - 2l) B) b = P/2 - 2l C) b = P/2 + 2l D) b =1/2 (P - 2l)

Answer 1

i think it is D, since
P = 2(l + b)
÷2
P/2 = l + b
- l
P/2 - l = b
which can be rearranged by multiplying by 2
which gets you
(P - 2l) = 2b
÷ 2 again
then you get
1/2 (P -2l) = b

Answer 2

Option (d) is correct.

`b=(1)/(2)(P-2l)`

Explanation:

Given : Formula P = 2( l + b )

We have to rearrange the given formula for b.

Consider the given formula

P = 2(l +b)

Divide both side by 2, we have,

`(P)/(2)=l+b`

Now, subtract l both side, we hvae,

`(P)/(2)-l=l+b-l`

Simplify, we have,

`(P)/(2)-l=b`

Taking lcm, we have,

`(P-2l)/(2)=b`

Thus,
`b=(1)/(2)(P-2l)`

Option (d) is correct.