Question

9. Smith decorated the boundaries of the windows of his
house with illumination on Christmas. Find the length of
the electricity wire needed if the two rectangular windows
are of size 75 cm x 60 cm and a trapezium shaped window
has parallel sides measuring 1.2 m, 80 cm; and non parallel
sides are 75 cm each.
[HOTS]​

Answer 1

Step-by-step explanation:

length of electricity wire = perimeter of two rectangular windows + perimeter of trapezium shaped window

perimeter of two rectangular windows = 2×[2×(l+b)]

4×75×60

18000cm

perimeter of trapezium shaped window= (120+80+75+75)cm

=350cm

length of wire = 18000+350 = 18350cm