Question 1051965
The A cylinder has 12cm diameter and water is filled in it up to 6.5m the B cylinder only show that it has 8cm in diameter.
Water is poured from A to B until the depth of the water in each container is the same. 
Find this depth. 
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Find the volume of water in cylinder A.
{{{Vol = pi*r^2*h}}}
r = 6 cm
h = 650 cm
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In both cylinders, that volume is
{{{Vol = pi*6^2*h + pi*4^2*h}}}
Solve for h.
It's arithmetic.