Question

$\text{In the pte chart representing the percentages of students having interest in reading various kinds of books, the central angle fo the sector representing students reading novels is}{81}^{\circ }.\text{What is the percentage of students interested in reading novels?}$

(a) $15\%$ (b) $18\%$

(c) $22\frac{1}{2}\%$ (d) $27\frac{1}{2}\%$

Answer 1

$\text{Answer = (c)}\text{Central angle of students reading novels}={81}^{\circ }\frac{81}{360}\times 100=\frac{45}{2}=22\frac{1}{2}\%$