Exercise 3

Lady Ingrid, a locomotive

Water

Everyone knows that steam engines must carry coal but they forget that locomotives must also carry a large quantity of water to produce the steam.

Lady Ingrid is about to have her water tank filled. Can you see the hose pipe? Mark, the fireman, is climbing up onto the tank to open the lid while Dave, the driver, is going to turn on the tap.

When you are an inspector you will need to check that this operation is carried out safely. Therefore, you will need to know something about the subject.

Lady Ingrid's tank holds 6000 litres. The tank is filled when 1000 litres are left in it.

Question 1: How many litres of water are needed to top up the tank?

Answer:   litres     

 

Water flows through the hose at a rate of 500 litres per minute.

Question 2: How many minutes does it take to top up the tank?

Answer:   minutes     

 

Lady Ingrid uses 1000 litres per hour. Her tank will be topped up when it has 1000 litres left.

Question 3: In how many hours' time will the tank have to be topped up again?

Answer:   hours     

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