into it. Find the ratio of surface areas of the balloon in the two cases.
A hemispherical bowl made of brass has inner diameter 10.5 cm. Find the cost of
tin-plating it on the inside at the rate of 16 per 100 cm.
Find the radius
Answers
Answered by
2
Answer:
Rs .27.72
Step-by-step explanation:
Given:
r=
2
10.5
=5.25cm
Surface Area
=2πr
2
=2×
7
22
×5.25×5.25
=173.25cm
2
⇒Cost of planting 100cm
2
area =Rs.16
⇒Cost of planting 173.25cm
2
area =Rs.
100
16×173.25
=Rs.27.72
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