Question 199866
W=L-15
2W+2L=210
2(L-15)+2L=210
2L-30+2L=210
4L=210+30
4L=240
L=240/4
L=60 ANS. FOR THE LENGTH.
W=60-15=45 ANS. FOR THE WIDTH.
PROOF:
2*45+2*60=210
90+120=210
210=210