Question

a rectangular fish tank measures 48 cm by 24 cm by 30 cm. It contains 6.75 litres of water. How much more water is needed to fill the tank completely? Give your answer in litres.

Answer 1

Answer:

Step-by-step explanation:

total volume of tank = 48x24x30 = 34560 mili litres, = 34.560 litres

water available in tank = 6.75 litres

water needed = 34.56 - 6.75

= 27.81 Litres

hope it helps you.

Answer 2

Answer:

The amount of extra water which is needed to fill the tank completely is $27.81$ litre.

Step-by-step explanation:

Given : For a rectangular fish tank, length = $48$ cm

                                                  Height = $24$ cm

                                                   Width = $30$ cm

           Water in rectangular fish tank = $6.75$ litres

To find :  How much more water is needed to fill the tank completely?

Solution :

• It is given that for a rectangular fish tank, length = $48$ cm

                                                           Height = $24$ cm

                                                            Width = $30$ cm

                          Water in rectangular fish tank = $6.75$ litres  

• We have to find that the amount of extra water which is needed to fill the tank completely.
• For this, we have to find the total capacity of a rectangular fish tank.
• To find the total capacity of a rectangular fish tank, we have to calculate the volume of a fish tank.
• The formula for volume of a rectangular tank is given below,

     Volume of a rectangular fish tank = length*height*width

                                                     = $48*24*30$

                                                     = $34560$ cu.cm.

• Now, convert the volume from cu.cm. to litres, to get

            Volume of a rectangular fish tank = $\frac{34560}{1000}$

                                                             = $34.56$ litre

• So, the amount of extra water which is needed to fill the tank completely

                      = Volume of a rectangular fish tank - $6.75$

                      = $34.56-6.75$

                      = $27.81$ litre

• ∴ The amount of extra water which is needed to fill the tank completely is $27.81$ litre.