Question

somebody please solve this question irrelevant answer will be reported​

Answer 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^^)