A cube-shaped piece of living tissue has sides of length 0.40 mm.
Calculate the surface area to volume ratio of the piece of tissue.
Give your answer in its simplest whole-number form.
102 exam-style questions on Edexcel GCSE Biology 8.1 Exchange surfaces and diffusion, covering 8.1.1 Introduction to exchange and transport, 8.1.2 Alveoli adapted for gas exchange, 8.1.3 Factors affecting rate of diffusion, and 8.1.4 Rate of diffusion using Fick's law. Each one has a worked solution and a mark scheme showing where the marks go.