A rectangle measuring 12m in width and 21m in length. It was extended by 1.5 metres all around. Calculate the new perimeter of the rectangle after the extension.
Answers
Answered by
1
Answer:
78
Step-by-step explanation:
new width= 15
new length = 24
perimeter = 2x ( 15+ 24)
= 2 x 39
= 78m
Answered by
1
12+1.5, 21+1.5 = 13.5 , 22.5
perimeter = 2( l+b)
= 2× 36= 72
after extension
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