railway RRB Technician Grade 3 Mock Test 2024 Quantitative Aptitude Mensuration Solid Figures

The slant height of the frustum of a cone is 8 cm. The perimeters of its circular bases are 20 cm and 12 cm. Find the curved surface area of the frustum.

1
116 cm2
2
108 cm2
3
128 cm2
4
120 cm2
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