Cambridge Secondary (7-9). Stage 9. Science. Learner's Book - Unit 8: Rates of reaction - Question 35

Use 27 identical construction cubes. Let the measured edge of one small cube be s cm. How would changing from the 3 × 3 × 3 cube to this 3 × 9 × 1 shape affect the rate of reaction, if the shapes were zinc metal and reacted with acid?