Question

n times
n' pyramids
239
of the sphere
solution
= 27R? + 2 tr + TER?-P)
r(2R² +22² + R² - 12)
- 22 (3R? +r?) = 22 (3x40° +352)cm
35 cm.
5 cm.
6025 x 22
cm
7
18935.71 cm² (approx).
is Rs.5 per 100 cm?
• Since only the
sample-11. A hemispherical bowl is made up of stone whose thickness is 5 cm. If the inner
SURFACE AREAS AND VOLUMES
dilis is 35 cm, find the total surface area of the bowl.
: Let R be outer radius and 'r'be inner radius Thickness of ring=5 cm
R= (r + 5) cm = (35 + 5) cm = 40 cm
al Surface Area = CSA of outer hemisphere+CSA of inner hemisphere + area of the ring.
circumference of the base of dome is 17.6 m, find the cost of painting it, given the cost of painting
Example-12. The hemispherical dome of a building needs to be painted (see fig 1). If the
and the sum​

Answer 1

Answer:

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