Mathematics for IGCSE & O level - Similarity (Section 3 - No. 6)
At noon a radio mast of height 12m has a shadow length of 16m. Calculate the height of a tower with a shadow length of 56m at noon.
36 m
42 m
48 m
56 m
คำอธิบาย
The ratio of height to shadow is constant. 12/16 = height/56. Height = (12/16)*56 = 42 m.