Question

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

Answer 1

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.