Toy question with cone cylinder and hemisphere with total height 40 cm. Find curved surface area
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Answer:
answer is 20 .........
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Answer: height of cylinder = 40 cm
radius of cone , hemisphere , cone = 3cm
h of cone 4 cm
Total surface area of toy = Surface area of hemisphere + surface area of cylinder + surface area of cone
= 2pie(r)^2 + 2pie(r)h + pie(r)l
l^2 = r^2 + h^2
l^2 = (3)^2 + (4)^2
= 9 + 16
= 25
= root25
l = 5 cm
S.A of hemi. ==> 2×22/7 × (3)^2
=2×22/7 × 9
=56.57 cm^2
S.A of cylinder = )2×22/7 (3)(40)
=754.28 cm^2
S.A of cone =) 22/7 (3)(5)
=47.14 cm^2
Total surface area of toy =) (56.57 + 754.28 + 47.14)cm^2
=857.99 cm^2
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