Use converting units.

The aquarium contains 1250 mL of water. How much more water is needed to fill the aquarium completely? Give your answer in Litres. Hint: Each side is 15cm

We can start by finding the volume of the aquarium in cubic centimeters (cm³), since the dimensions are given in centimeters. The aquarium is a rectangular prism with height, length, and width of 15 cm each, so:

volume = height x length x width
volume = 15 cm x 15 cm x 15 cm
volume = 3375 cm³

Now we need to convert this volume to milliliters (mL), since the initial amount of water given is in mL. We know that 1 cm³ is equivalent to 1 mL, so:

3375 cm³ = 3375 mL

Therefore, the aquarium can hold up to 3375 mL of water. Since it currently contains 1250 mL, we can find the amount of additional water needed by subtracting:

additional water = 3375 mL - 1250 mL
additional water = 2125 mL

Finally, we can convert this amount to liters (L) by dividing by 1000 since there are 1000 mL in 1 L:

additional water = 2125 mL ÷ 1000
additional water = 2.125 L

Therefore, we need 2.125 more liters of water to fill the aquarium completely.

To determine how much more water is needed to fill the aquarium completely, we need to calculate the total volume of the aquarium in liters and then subtract the amount of water already in it.

Given that each side of the aquarium is 15 cm, we can find the volume by calculating the length × width × height.

The length, width, and height of the aquarium are all 15 cm, since each side has the same measurement.

Converting cm to liters:
1 cm³ = 1 mL
1 L = 1000 mL

So, the volume of the aquarium in cm³ is: 15 cm × 15 cm × 15 cm = 3375 cm³

To convert this volume to liters, divide by 1000: 3375 cm³ ÷ 1000 = 3.375 L

Since the aquarium already contains 1250 mL, which is equivalent to 1.25 L, we can subtract this amount from the total volume:
3.375 L - 1.25 L = 2.125 L

Therefore, 2.125 liters more water is needed to fill the aquarium completely.