Question

Two cones with same base radius 8 cm and height 15 cm are joined together along their bases. Find the surface area of the shape so formed.

NCERT Class X
Mathematics - Exemplar Problems

Chapter _SURFACE AREAS AND VOLUMES

Answer 1

After joining, the surface area will consist of lateral surface areas of two cones.
cm
r = 8cm
h = 15cm
l = √8² + 15² = √64+225 = √289 = 17cm

Surface area = 2×πrl = 2×3.14×8×17 = 854 cm²

Answer 2

Step-by-step explanation:

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