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# !A Simalarity percularity! watch

1. Hi I cannot seem to solve this simalarity problem:

Three drinking glasses are mathematically similar.
The Capacity of glass A is 200ml and has a height of 9cm.
The height of glass B is 12.2cm

Calcuate the capacity of glass B.
.

(ive been working hours on this- and frankly Im gettig nowhere- please show me how you worked out the answer)
2. (Original post by Sophie Maywood)
Hi I cannot seem to solve this simalarity problem:

Three drinking glasses are mathematically similar.
The Capacity of glass A is 200ml and has a height of 9cm.
The height of glass B is 12.2cm

Calcuate the capacity of glass B.
.

(ive been working hours on this- and frankly Im gettig nowhere- please show me how you worked out the answer)
Glass B is bigger than glass A.

The length scale factor is 12.2 divided by 9.

Capacity is a measure of liquid volume.

The volume of glass B divided by the volume of glass A is the cube of the length scale factor.
3. (Original post by Mr M)
Glass B is bigger than glass A.

The length scale factor is 12.2 divided by 9.

Capacity is a measure of liquid volume.

The volume of glass B divided by the volume of glass A is the cube of the length scale factor.
Therefore, it is:

200x(12.2/9)^3
4. (Original post by Sophie Maywood)
Therefore, it is:

200x(12.2/9)^3
Yes, that's right.

Did you understand why we needed to cube the length scale factor as that is the key point?

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