EXPLANATION
Assuming that the swimming pool length is l= 26.3 feet and the width is w= 18.6 feet, we first need to compute the area from the outside as follows:
[tex]\text{Area}_{\text{outside}}=26.3\cdot18.6=489.18ft^2[/tex]Now, we need to compute the area of the inside part as follows:
[tex]\text{Area}_{i\text{nside}}=10.2\cdot4.7=47.94ft^2[/tex]Finally, we need to subtract the outside area to the inside area:
[tex]\text{Area}_{\text{available}}=489.18-47.94=441.24ft^2[/tex]In conclusion, the available area for adults is 441.24 ft^2
