Mathematics for IGCSE & O level - Mensuration (Section 8 - No. 30)

A solid cone has base radius of 6.5 cm and a height of 6.3 cm. Calculate its total surface area.

235.1 cm²

410.4 cm²

334.4 cm²

256.3 cm²

To calculate slant height, s= √(6.3² + 6.5²) = 9.06cm, Total SA = πr(r + s) = π*6.5*(6.5+9.06) = 334.4 cm²