Jawab:

729 liters

Penjelasan dengan langkah-langkah:

To find out how many liters of water are in the tub, we need to find the volume of the tub and then convert it to liters. Since the bathtub is a cube, the volume can be found by using the formula:

Volume = side length^3

In this case, the side length is 90 cm, so the volume is:

Volume = 90^3 cm^3

To convert cubic centimeters to liters, we divide the volume by 1000. So:

Volume = 90^3 cm^3 / 1000

= 729000 cm^3 / 1000

= 729 L

So the tub is filled with 729 liters of water.