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Saima wants to put a lace on the edge of a circular table cover of diameter 1.5 m. Find the length of the lace required and also find its cost if one meter of the lace costs 15. (Take p = 3.14). (show working too) stop copying from others

User Grigorevp
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1 Answer

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The required length of lace = 4.17m and the cos for lace of 4.17m is ₹ 70.65.


  • \text{Circumference of the circle}=2\pi r

  • \text{Radius of circle}=\frac{\text{diameter}}{2}

Step 1:

Find the radius, r of the circular table.

Given that, Salma wants to put a lace on the edge of a circular table of diameter

Diameter of circle, d=1.5m

Radius of circle,
\text{r}=(1.5)/(2)\text{m}

Step 2:

Find circumference of the circle.

Substitute
\text{r}=(1.5)/(2)\text{m} in formula


\text{Circumference of the circle}=2\pi r

Take
\pi =3.14


=2*3.14*(1.5)/(2)


=3.14*1.5


=4.71 \ \text{m}


\text{Circumference of circle} = 4.71 \ \text{m}


\text{The length of lace required is 4.71} \ \text{m}

Step 3:

Find the cost of rope.

From step 2


\text{Length of lace required} =\it{4.17} \ \text{m}

Given that, of the lace costs ₹ 15

From the above statement, form an equation.

Cost of 1m lace = ₹ 15

Therefore, cost of 4.17m lace

Required length of lace = 4.17m. Cost for lace of 4.17m is₹ 70.65.

User DaveGreen
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