Question

a measuring cylinder of radius 3cm contains water to a height of 49cm.if this water is poured into similar cylinder of radius 7cm,what will be the height of the water column?
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Answer 1

Answer:

21 I think. I've never done a problem like this so if it's a one time answer I wouldn't reccomend using this unless you understand the explanation perfectly, and why it is explained like that.

Step-by-step explanation:

3cm x 49cm = 147cm (area)

If the area is divided into columns of 7cm, you divide 147 by 7 and you get the area of what one column is worth.

Answer 2

Answer:

9 cm

explaination:

volume of water will be constaint in both the cases

$\pi \: r^{2} h = \pi \: r ^{2} \: h$

pi will cancel from lhs and rhs.

so

3 x 3 x 49 = 7 x 7 x h

h = 9 cm