A toy is in the form of a cone mounted on a hemisphere of common base radius 7 cm. The total height of toy is 30 cm. Find the total volume of the toy. (use = 22/7)
*PLEASE ANSWER ONLY IF YOU KNOW* (DON'T SPAM)
Answers
Answered by
0
I think it is helpful for you
REFFER TO THE ATTACHMENT
Attachments:
Answered by
0
Answer:
858 cm square
Step-by-step explanation:
Since, total height of the toy is 31 cm. But given that conical part is mounted on a hemisphere of radius 7 cm. ∴ The height of the cone is h = 31 – 7 = 24 cm. And radius of cone is r = 7cm. ∴ The slant height of the cone is l = √ r 2 + h 2 = √ 7 2 + 24 2 = √ 49 + 576 r2+h2=72+242=49+576 = √ 625 =625 = 25 cm. Now, total surface area of toy = surface area of hemisphere + surface area of cone. = 2 π r 2 + π r ( 2 π + l ) 2πr2+πr(2π+l) = 22 7 × 7 ( 2 × 7 + 25 ) 227×7(2×7+25) = 22 × ( 14 + 25 ) = 22 × 39 = 858 22×(14+25)=22×39=858 = cm2. Hence, the total surface area of the toy is 858 cm2.
Similar questions