Question

Salma 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 Rs. $15$. (Take $\pi =3.14$)

Answer 1

Diameter of the circular table cover$=1.5$m
$\therefore$Radius of the circular table cover$=\frac{1.5}{2}$m
Circumference of circular table cover$=2\pi r=2\times 3.14\times \frac{1.5}{2}=4.71$m
Therefore the length of required lace is $4.71$m
Now the cost of $1$ m lace$=$Rs. $15$
Then the cost of $4.71$ m lace$=15\times 4.71=$Rs. $70.65$
Hence, the cost of $4.71$ m lace is Rs. $70.65$.