A toy is in the form of a cone mounted on a hemisphere of radius, 1.75 cm. If the total height of the toy is 7.75 cm, find the total surface area.
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answer:
radius of hemisphere=1.75cm
total height of the solid=7.75cm
height of the cone= 7.75-1.75=6.00cm
slant height of cone= 6.25cm
T.S.A of the solid = C.S.A of cone + C.S.A of hemisphere
= 22/7+1.75(6.25+3.5) = 53.625cm2
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