maths

Carlos is laying concrete to make the floors of two rooms. The dimensions of the rooms are shown below. He needs to use 0.1m3 of concrete to make 1m2 of floor. The concrete will cost £65 per m3. How much will it cost to buy enough concrete for the floors?

(Rectangle number 1 : 7m by 3m
Rectangle number 2 : 6m by 2m

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  1. Clearly the floor is 0.1m thick. So, multiply the volume by the unit cost, and you get a cost of

    (7*3 + 6*2)(0.1)(65) = ?

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  2. There is no need for you to say 'Clearly'. However, thank you for the answer.

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  3. Clearly you were having trouble, as you posted no work of your own.

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  4. Aaa

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