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

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 = $2\pi r$
$=2\times 3.14\times \frac{1.5}{2}=4.71m$
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 ₹ 70.65