Question

a mirror of length 30 cm and width 20cm is to be framed with a 2 cm wide frame find the area of the frame required also find the cost of framing at the rate 20 per cm square
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Answer 1

The area of the frame required is 216 sq.cm. and the cost of framing is Rs.4320

Length of mirror = 30 cm

Breadth of mirror = 20 cm

Width of frame = 2 cm

So, Outer length = 30+(2+2)=34 cm

Outer breadth = 20+2+2=24 cm

Area of frame = Outer area - inner area = (34*24)-(30*20)=216

Cost of framing 1 sq.m. = rs.20

Cost of framing 216 sq.m. = 216 \times 20 = Rs.4320

Hence the area of the frame required is 216 sq.cm. and the cost of framing is Rs.4320