Mathematics for IGCSE & O level - Similarity (Section 1 - No. 8)
A model rocket is 1/10 the size of the actual rocket. If the surface area of the model is 50 cm², what is the surface area of the actual rocket?
500 cm²
1000 cm²
2500 cm²
5000 cm²
Giải thích
Scale factor is 10. Area is the square of the scale factor. 50*100 = 5000cm²