Question

A rectangular field has a perimeter of (10a-6) metres and a width of 2a metres. Which expression represents the length of this field?

Answer 1

Answer:

P = 10a -6

B = 2a

we know that

P = 2(L+B)

A/Q

10a-6 = 2(L-2a)

10a-6 = 2L - 4a

10a-6 + 4a = 2L

14a - 6 = 2L

L =

$\frac{14a \: - \: 6}{2}$

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