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 $\pi =3.14$).

Answer 1

From the given details we get to know that diameter of the circular table is $1.5$m & we are going to determine the length of the lace required and its cost if one meter of the lace costs ₹ $15$.

We know that. radius (r) = $\frac{d}{2}$

= $\frac{1.5}{2}$

=$0.75$ m

Also

Circumference of the circle =$2\pi r$

=$2\times 3.14\times 0.75$

= $4.71m$

So, the length of lace =$4.71m$

Cost of 1 m lace = ₹ $15$ [given]

Cost of 4.71 m lace = ₹ $15\times 4.71$

= ₹$70.65$

Length of the ace required=$4.71m$

Hence, the cost of $4.71m$ lace is ₹ $70.65$