Question
A swimming pool 9 m wide and 12 m long is 1 m deep on the shallow side and 4 m deep on the deeper side. It volume is :
Answer: Option B
Volume :
$$\eqalign{
& = \left[ {12 \times 9 \times \left( {\frac{{1 + 4}}{2}} \right)} \right]{m^3} \cr
& = \left( {12 \times 9 \times 2.5} \right){m^3} \cr
& = 270\,{m^3} \cr} $$
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Volume :
$$\eqalign{
& = \left[ {12 \times 9 \times \left( {\frac{{1 + 4}}{2}} \right)} \right]{m^3} \cr
& = \left( {12 \times 9 \times 2.5} \right){m^3} \cr
& = 270\,{m^3} \cr} $$
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