Mathematics for IGCSE & O level - Similarity (Section 3 - No. 5)
Two similar containers hold 1 litre and 2 litres of milk. If the surface area of the larger container is 1100 cm², what is the surface area of the smaller one?
550 cm²
777.8 cm²
1100 cm²
1555.6 cm²
Explicació
Volume scale factor = 2/1 = 2. Length scale factor = cube root of 2. Area scale factor = (cube root of 2)², 1100 / (cube root of 2)² = 777.8 cm²