Since this question appeared on the June 2015 non-calculator exam that my year 11's sat for their mocks, I have been searching for similar questions and resources. For some reason, and party down to the fact that I can't figure out what the topic is called.. I can't find anything! So I've called it 'Funtional Volume' and put together some questions that I'll be using in January.
Below there is a worksheet that I made with 6 questions, another worksheet with some past exam questions, a powerpoint and SMART notebook file that I have imported the images into to be used on the interactive board alongside the worksheets.