Question 1169347: A city park has a circular goldfish pond with a diameter of 40 metres. Park officials want to surround the pool with a 100 centimetre-wide cement walk. Find the volume of cement needed for this project, to the nearest tenth of a cubic metre, if the layer of concrete is to be 20 centimetres deep
Found 2 solutions by josgarithmetic, ikleyn:
Answer by josgarithmetic(39625)   (Show Source):
You can put this solution on YOUR website! The AREA of the path,  , in square meters.
Thickness top to bottom is 0.2 meters, so volume of the path is  , in cubic meters. Compute the value.
Answer by ikleyn(52855)  (Show Source):
You can put this solution on YOUR website! .
A city park has a circular goldfish pond with a diameter of 40 metres. Park officials want to surround the pool
with a 100 centimetre-wide cement walk. Find the volume of cement needed for this project, to the nearest tenth of a cubic metre,
if the layer of concrete is to be 20 centimetres deep
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For your info
Cement mass comprises only small fraction of the concrete mass.
Therefore, the presented data is not enough to answer the problem's question.
Strictly saying, it is not a Math problem - - - it is a provocation, instead.
Or a very unprofessional formulation - - - of the two my statements choose whichever you like more.
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