All of them have the same answer of -8 except the last one.
Are you taking the state test-
Answer:
The Taj Mahal
The Taj Mahal was built in 1648 by Shah Jehan as a memorial to his wife. Today, it is listed as one of the new Seven Wonders of the World. Mughal Emperor Shah Jahan, lost his wife Mumtaz Mahal on June 17,
The answer is 21 m squared
3(5)=15
3(2)=6
15+6=21