Jawab:

To determine the fraction of Tank Q that was filled with water, we need to compare the volumes of water in Tanks P and Q.

The volume of water in Tank P is given as 15 cm³, and the dimensions of Tank P are not provided. So, we cannot determine the volume of Tank P.

The volume of Tank Q is given as 8 cm x 12 cm x 10 cm = 960 cm³.

Since an equal amount of water was poured into both tanks, let's assume that the volume of water in Tank P is also 960 cm³.

Now, to find the fraction of Tank Q that was filled with water, we divide the volume of water in Tank Q by the total volume of Tank Q:

Fraction filled = (Volume of water in Tank Q) / (Total volume of Tank Q)

              = 960 cm³ / (8 cm x 12 cm x 20 cm)

              = 960 cm³ / 1920 cm³

              = 0.5

Therefore, the fraction of Tank Q that was filled with water is 0.5, or 1/2.