plz answer this question.
Answers
Answer:
uh have given .. length of perpendicular and base by this find the hypotenus and then uh will have similar side ... add the both. . side. by finding .. hypotenus... and of hemisphere .. uh have given... formula... so it will easy for uh to find
Answer:
Vol of cone = 1/3 πr^2h
= 1/3 × 3.14 × 3 × 3 × 4
= 37.68 cm^3
Vol of hemisphere = 2/3πr^3
= 2/3 × 3.14 × 3 × 3 × 3
= 56.52 cm^3
Total vol of toy = 37.68 + 56.52 = 94.2 cm^3
slant height ( l ) of cone = √h^2 + r^2
= √16 + 9
= √25
= 5 cm
S.A of cone = πrl
= 3.14 × 3 × 5
= 47.1 cm^2
S.A of hemisphere = 2πr^2
= 2 × 3.14 × 3 × 3
= 56.52 cm^2
Total S.A of toy = 47.1 + 56.52
= 103.62 cm^2