By how much taller is the door 2meters than the boy 78meters
It would help if you proofread your questions before you posted them.
"boy 78meters" = 226 feet tall?
Assuming that you meant cm:
200cm - 78cm = 122cm = 1.22m
"boy 78meters" = 226 feet tall?
Assuming that you meant cm:
200cm - 78cm = 122cm = 1.22m