Check out the refreshed revision resources for GCSE Maths: Solving 2D and 3D problems using Pythagoras's, with step-by-step slideshows, quizzes, practice exam questions, and more!

A cable is attached, 30 metres above ground level, to a post. The other end of the cable is 14 metres from the base of the post. Regulations state that the cable must measure less than 35 metres. If A ...