A. 10ft by 15ft
You convert the measurements into improper fraction with a denominator of 4 ( this will tell you how many times 1/4" goes into the measurements, which will then tell you the foot conversions.
2 1/2" × 3 3/4"
2 1/2" = 5/2" = 10/4" = 10'
3 3/4" = 15/4" = 15'
Therefore, the bedroom is 10ft by 15ft, A