February 25th, 2019, 06:03 AM  #1 
Newbie Joined: Feb 2019 From: uk Posts: 2 Thanks: 0  GCSE maths homework help
Please help me solve these questions, thanks. Links to question: https://ibb.co/BsLs4WL https://ibb.co/SrJQLL2 Last edited by skipjack; February 25th, 2019 at 06:42 AM. 
February 25th, 2019, 06:45 AM  #2 
Global Moderator Joined: Dec 2006 Posts: 20,484 Thanks: 2041 
The diagram already divides the roof into two parts. I'll assume that the left part is a trapezium and the right part is a rectangle. Area(trapezium) = base × average height = a(a + d)/2 = a²/2 + ad/2. Area(rectangle) = base × height = bc. I assume you can complete part (a) from there. For part (b), the peak power output is the product of the roof area and the given power output per square metre. I assume you can write that as a formula. 

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