What would the area of an actual pool be the scale from the drawing is 3: 1000

the complete question in the attached figure

we know

the pool in the drawing is 15x7.5    and the scale is 3/1000

then

if the size in the drawing  is 3----------------------> the actual is 1000

15------------------------------------< X

x=15*1000/3=5000 cms----- > 50 m

and

if the size in the drawing  is 3----------------------> the actual is 1000

7.5------------------------------------< X

x=7.5*1000/3=2500 cm--------> 25 m

the actual area of the pool is 50*25=1250 m²

the answer is 1250 m²