somebody please solve this question irrelevant answer will be reported
Attachments:
Answers
Answered by
1
Answer:
1.
According to question.
43 π( 3³)+43 π (4³ )+43 π (5³ )+43 π( r³)
27+64+125 = r³
216 = r³
r = 6
The surface area of all three spheres
=4 π(3²)+ 4 π(4²)+ 4 π(5²)
=4 π * 9 + 4 π * 16 + 4 π * 25
= 200 π
The surface area of new sphere = 4π6²
= 144π
Required decrease =
= 28%
2.
From the similarity of triangles
8−r/10
= r/6
48−6r=10r
r=3
Fraction of water overflows
= Volumeofsphere/Volumeofcone
=3/8
hence ratio is3:8
Hope it helps!
(pls mark it the Brainliest^^)
Similar questions