Let x be the width.
length is 25m greater than the width, hence, x+25 will represent the length.
perimeter is 310m
W=x
L= x+25
Solution:
P=2(L+w)
310m=2[(x+25m)+x)]
combine like terms
310m=2(2x+25m)
310m=4x+50m
transpose
310m-50m=4x
260m=4x
divide both sides by 4
65 = x
now that we have the measurement of the width. get the measurement of the length
Length= x+25m
L=65m+25m
L=90m