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Kelly is busy building her new house. The length of the house is 11m and the width is 6,10m. The building is a double storey. The details above are found in her notebook.

The length of the top floor is 11m, the width, including the balcony, is 7,60m and
the thickness is 17cm.

a)    How wide is the balcony?

b)    Calculate the volume of the concrete used for the top floor.

c)    If the maximum load of concrete that a lorry can carry is 6m3, how many loads of concrete were delivered to pour the top floor? Give a reason for your answer.

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a)    Wide of balcony = 7.6 - 6.1 = 1.5 m

b)    Volume of the concrete used for the top floor = 11 x 7.6 x 0.17

= 14.212 = 14.21 m3

c)    Maximum load of concrete that a lorry can carry is 6m3

Number of loads of concrete that were delivered to pour the top floor = 14.21/6

= 2.36866....

Therefore 3 loads were delivered, to provide for the adequate amount required.
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