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Question
Olivia bought 40 m wire for fencing her own rectangular field of length 9 m and width 7 m. How much wire is left with her?
Olivia bought 40 m wire for fencing her own rectangular field of length 9 m and width 7 m. How much wire is left with her?
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Solution
The correct option is B 8 m
Wire required to fence the field
= Perimeter of the field
=2×(Length + Width)
(Perimeter of rectangle = 2× (Length + Width))
=2×(9+7)
=2×16
=32 m
Wire left = Total wire - Wire used
=40−32=8 m
Therefore, wire left with Olivia = 8 m, (b) is the correct option.
Wire required to fence the field= Perimeter of the field
=2×(Length + Width)
(Perimeter of rectangle = 2× (Length + Width))
=2×(9+7)
=2×16
=32 m
Wire left = Total wire - Wire used
=40−32=8 m
Therefore, wire left with Olivia = 8 m, (b) is the correct option.
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