ch 12cm 4. Which of the following shows the correct perimeter? 10cm a. P= 10cm + 7 cm + 5cm + 7 cm 7cm 7cm 5cm b. P= 10cm + 7 cm
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ch 12cm 4. Which of the following shows the correct perimeter? 10cm a. P= 10cm + 7 cm + 5cm + 7
ch 12cm 4. Which of the following shows the correct perimeter? 10cm a. P= 10cm + 7 cm + 5cm + 7 cm 7cm 7cm 5cm b. P= 10cm + 7 cm
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Answer:
82 m.
It can be written as 5 cm + 5 cm + 3 cm + 3 cm
= (2 × 5) cm + (2 × 3) cm
= 2 (5 + 3) cm
= 2 × 8 cm
= 16 cm
We add length and breadth twice to find the perimeter of a rectangle.
Step-by-step explanation:
Solution:
Length of the display board = 8 m
Breadth of the display board = 6 m
Perimeter of the display board = 2(Length + Breadth)
= 2(8 + 6) m
= 2 × 14 m
= 28 m.
Cost of ribbon is $15 per metre.
Therefore, total cost for 28 m long ribbon = $15 × 28
= $420.
hope it helps.
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