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Q.6 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 metre of the lace costs Rs.15. (Take \(\pi \)= 3.14)
Answer :

Diameter of the table cover = 1.5 m
\(\therefore \)Radius\( =\frac{1.5}{2}= 0.75 m \)
\(\therefore \)Length of the lace \(= 2\pi r = 2 × 3.14 × 0.75 = 4.71 m \)
Cost of the lace = Rs. 15 × 4.71 = Rs. 70.65