the width of the blanket is 4 ft
it is given that length is 3 times of width so the length is 3 * 4 = 12 ft
part b)
so the blanket is rectangular.
the perimeter of the blanket is
2(4+12) = 32
area of the blanket is
length x width
12 x 4 = 48 square ft
part a)
the diagram of the blanket is given as follows,
