It should be obvious to anybody that the answer will depend on the units used for 24.5, which are unspecified. For example, 24.5 feet to the nearest inch will be quite different to 24.5 centimetres!
1 inch
0.995 inches rounded to the nearest tenth of an inch is 1.0 inch.
If that's already cubic inches, it is already rounded to the nearest cubic inch. If it isn't, it won't round to them.
1.0"
63 inches
245
240
30 inches, rounded to the nearest inch, is 30 inches.
Five inches rounded to the nearest 16th of an inch is five inches.
235 cm rounded to the nearest hundredths of an inch is 92.52 inches.
6.687898089171975 inches rounded to the nearest one-eighth inch is 6.75
0.995 inches rounded to the nearest tenth of an inch is 1.0 inch.
1 inch
All of these numbers can be rounded to the nearest tenth of an inch.
that is 1.0 inch
1 inch
245 to the nearest hundred is 200.