Mathematics for IGCSE & O level - Mensuration (Section 3 - No. 21)
A cone has a base radius of 4.2cm and a slant height of 15.0cm. Calculate its height.
13.8 cm
14.3 cm
14.9 cm
13.3 cm
คำอธิบาย
h = √(l² - r²); where l is slant height. Height= √(15² - 4.2²) = 14.3cm