A rectangular piece of 20 cm x 15 cm is cut off from a bigger rectangle as
shown in the figures below. In each case, find the difference in perimeter
before and after the piece is cut off.
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8 cm is difference in perimeter before and after the piece is cut off
Step-by-step explanation:
correction 20 * 15 is 10 * 15
complete question in figure
initial perimeter = 10 + 15 + 6 + 7 + 4 + 22
=64 cm
A rectangular piece of 10 cm x 15 cm is cut off
Size of two pieces
10 * 15 cm & 4 * 7 cm
Perimeter of 10 * 15 cm = 2(10 + 15) = 50 cm
Perimeter of 4 * 7 cm = 2(4 + 7) = 22 cm
Total Perimeter after cutting = 50 + 22 = 72 cm
difference in perimeter before and after the piece is cut off = 72 - 64 = 8 cm
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