5. How much lace will be needed to put around a square cushion of side 70 cm? What will be the cost of the lace required if the lace costs 10 per metre?
Answers
Answer:
Thus the cost of the required lace is 20.8 Rs.
Step-by-step explanation:
How much lace will be needed to put around a square cushion of side 70 cm? What will be the cost of the lace required if the lace costs Rs.10 per meter?
Hint: In this question, we will calculate the perimeter of a square. Then we will convert the perimeter into meters because the cost of lace is Rs.10 per meter. From here we can simply calculate the cost of the lace required to put around the cushion cover.
Complete step-by-step answer:
Length of the side of a square cushion = 70 cm
Perimeter of a square cushion = 4 × side = 4 × 70 = 280 cm =
280
100
=2.8m
Cost of the lace per meter = Rs. 10
Cost of lace required to put around the square cushion = 2.8 × 10 = Rs.28
Thus, the length of a lace required to put around the cushion cover is 2.8 m
Cost of lace required to put around the square cushion is Rs.28
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We need 280 cm lace.
Cost will be 28.
Step-by-step explanation:
First we find the perimeter as we need to put the lace around.
= 4 × SIDE
= 4 × 70cm = 280cm/2.8m
Then,
Multiply the amount of one meter to total length or perimeter.
= 10 × 2.8
= 28