A toy is in the shape of hemisphere...a small hemisphere is mounted on bigger hemisphere..radius of small is 1 cm and bigger is 2cm find total surafce area
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the correct answer is 40.82 cm²
explanation: as shown in the figure the red part
will not be counted.
therefore, the total surface of toy
=t.s.a(bigger hemisphere)+c.s.a(smaller hemisphere)- a(base of smaller hemisphere)
=3πr²+2πr²-πr²
=3×3.14×4+2×3.14×1-3.14×1
=37.68+6.28-3.14
=43.96-3.14
=40.82cm²
explanation: as shown in the figure the red part
will not be counted.
therefore, the total surface of toy
=t.s.a(bigger hemisphere)+c.s.a(smaller hemisphere)- a(base of smaller hemisphere)
=3πr²+2πr²-πr²
=3×3.14×4+2×3.14×1-3.14×1
=37.68+6.28-3.14
=43.96-3.14
=40.82cm²
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einstein345:
its correct
^o^ I'm glad
thanks
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