Question

The perimeter of a rectangular field is 306 m. If the width of the field is 68 m, what is it’s length?Please help!

Answer 1

306 m = perimeter
68 + 68 = 136
306 - 136 = 170
170 / 2 = 85
So therefore the width is 85 m
Check

68 + 68 + 85 + 85 = 306
136 + 170 = 306
306 = 306

Answer 2

The Length is 85 m

Explanation:

? = l

68 = w

306 = P

The perimeter formula is P = 2(l+w) or P = (l+w) + (l+w)

306 = 2(l+68)

306 = 2l + 136

306 - 136 = 2l + 136 - 136

170 = 2l

`(170)/(2)` =
`(2l)/(2)`

85 = l

Length is 85 m