Question

There are 80 litres of water in a tank. The water flows out of the tank at a rate of 125 millilitres per second. Work out the time, in seconds, that it takes for all of the water to flow out of the tank.

Answer 1

To determine the time it takes for the water to flow out of the tank, convert the tank's volume to millilitres and divide it by the flow rate. The calculation shows that it will take 640 seconds for an 80-litre tank to empty at a rate of 125 millilitres per second.

Step-by-step explanation:

The student has asked how long it will take for all the water to flow out of a tank if the tank contains 80 litres of water and the water flows out at a rate of 125 millilitres per second. To solve this problem, we need to convert the volume of the tank to millilitres since the flow rate is given in millilitres per second. There are 1,000 millilitres in a litre, so an 80-litre tank holds 80,000 millilitres of water. The next step is to divide the total volume of water by the flow rate:

80,000 millilitres / 125 millilitres/second = 640 seconds.

Therefore, it will take 640 seconds for all the water to flow out of the tank.