I am having trouble solving this problem,can anyone help me?

Question

A rectangle picture window measures 87 cm x 152 cm. Window insulation is applied along all 4 sides. The insulation costs $7.00 per meter. What will it cost to insulate the window?

Answer 1

Window : 87 w x 152 h

Perimeter =  2w + 2h

                   2(87) + 2(152) =  174 + 304 = 478

                   478/100 >> 4.78 m

                   4.78 x 7.00 =  about  $33.46 plus tax....