63

The sector is

; there are 360 degrees in a circle.
You use the formula

.
18cm is the radius, and then you square it to get 324.
Multiply 324 by

You get 63
Well technically this problem is wrong, as two sides are the same on a rectangle on each side.
(p)=(333+114)•3
because 114 pages are already read and if he needs 333 pages to reach 1/3 of the book you add 114 and 333 so you can find out how much pages is 1/3 of the book. then you multiply that number by 3 because there are 3 sections of 333+114.
87.96 just divide 24 by 25 and keep the whole number as is