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

Answer 1

Diameter of the circular table cover$$=1.5$$m
$$\therefore$$Radius of the circular table cover$$=\dfrac{1.5}{2}$$m
Circumference of circular table cover$$=2\pi r=2\times 3.14\times \dfrac{1.5}{2}=4.71$$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. $$70.65$$.