ए एंड बी कैन दो ए पीस ऑफ वर्क इन 30 डेज व्हाईल बी एंड सी कैन दो थे सेम वर्क इन 24 डेज एनसी एंड ए इन 20 डेज द ऑल वर्क टुगेदर फॉर 10 डेज हाउ लोंग विल आईटी टेक टो फिनिश थे रीमेनिंग वर्क
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Assume t = unless stated othe
7
1. Find the surface area of a sphere of radius:
(i) 10.5 cm
(ii) 5.6 cm
2. Find the surface area of a sphere of diameter:
(1) 14 cm
(i) 21 cm
3. Find the total surface area of a hemisphere of radius
4. The radius of a spherical balloon increases from 7 cm
into it. Find the ratio of surface areas of the balloo
5. A hemispherical bowl made of brass has inner di
tin-plating it on the inside at the rate of 16 per 10
Find the radius of a sphere whose surface area is 1
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