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A toy is made my joining a cone on the top of a hemisphere of equal diameter7cm. If the total height of toy is 31cm find its total surface area. |
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Answer» Answer: Hey mate. Here's your answer. Step-by-step explanation: Given,a toy is MADE by JOINING a cone on the top of a HEMISPHERE of equal diameter 7 cm and the TOTAL height of toy is 31 cm. The radius of the sphere = The radius of the cone = 7 cm The height of the cone = total height - the radius of the sphere =(31-7) cm= 24 cm
r=radius of the sphere, h= height of the sphere Then the slant height of the cone(l) =√r²+h² = √7²+24² cm =√625 cm =25 cm.
Therefore the surface area of the cone=πrl =(22/7×7×25)cm² =550 cm². The surface area of the hemisphere is=2πr² =2×22/7×7² cm² =308 cm². Therefore total surface area = (308+550) cm²=858 cm². Hope this helps you. THANK you and please mark me the brainliest. |
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