The length of a study room is 5 m 45 cm. Tammy’s desk is 1 m 20 cm, and her brother’s desk is 1 m 30 cm. Can both of their desks fit in the study room?

The total length of the two desks is:

1 m 20 cm + 1 m 30 cm = 2 m 50 cm

This is less than 5 m 45 cm, so both of the desks will fit in study room.