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if i had to build a pool that is 15 metres long, 5 metres wide and 2 metres deep
and if the walls of the pool are to be made out of concrete that is 10 cm thick,
what will the dimensions of the hole in the ground need to be?
A 10 cm wall will add 20 cm to the length and the width
15.2 by 5.2, length and width
It will add 10 cm to the depth, assuming you have 10 cm under the pool
2.1 m deep
A hole at least 15.2 by 5.2 by 2.1
how many cubic metres of concrete will be needed to build this pool?
Concrete Vol (V) = Total volume - pool volume
V = (15.2*5.2*2.1)- (15*5*2)
V = 165.984 - 150
V ~ 16 cu/m of concrete required