Exercise 6

coal on shovel

More on coal

When you are an inspector it will be very useful if you can work out how much it costs to run a preserved railway.

Coal costs £66 per tonne.

Question 1: If Lady Ingrid used 100kg of coal per hour, what would this cost?

She actually uses 90kg at a cost of £5.94.

Question 2: If Lady Ingrid's bunker held 400kg of coal, what would it cost to fill the bunker?

It actually holds 360kg which costs £23.76.

Which set of answers is correct?

set A   1:  £66   2:  £23.40
set B   1:  £6.60   2:  £26.40
set C    1:   £5.60   2:   £32.40

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