A slice is cut from a large pizza with center O O\,O and a radius of 15 cm. The outer crust of the slice (arc ABABAB) measures 20 cm in length.

Find the area of the surface of the pizza slice.
Practise Edexcel GCSE Maths Sector Areas and Arc Lengths with exam-style questions for Foundation and Higher tier. 34 questions, matched to the Edexcel GCSE Maths (1MA1) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.