I really need help with this ... I've been stuck for ages even though I thought I was doing it right. Can someone please go through and explain to me (there's a link)...

Step-by-step explanation:

height of water in cylinder (h) =3/4 x 30cm =22.5 cm

diameter (d)  = 12cm            radius = d/2 =12cm /2 =6cm

Volume (V1)=r^2h= 22/7 x (6cm)^2 x 22.5cm =22/7 x 36cm^2 x 22.5cm

                                                                      =2545 cm^3

Diameter = d = 8cm                           radius = r = 8cm/2 =4cm

π =22/7

Volume (V2 )=(4/3) πr^3 = (4/3) π(4cm)^3 = (4/3) x 22/7 x64cm^3 =268cm^3

total volume after the sphere entered =V1 +V2 =(2545 +268)cm^3

                                                                             =2813cm^3

now yoy use the volume formula but make height the subject

V=πr^2h                     h=V/πr^2h =2813cm^3 /(22/7) x (6cm)^2

                                                    =2813cm^3 x 7 /22 x36cm^2

                                                    =19691cm^3  /  792cm^2

                                                    =24.9 cm

therefore the height of the water in the container is 24.9 cm

step-by-step explanation:

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