30 ft should be the answer
If a submarine is 756 feet below sea level in order to come to 0 sea level it will have to rise as much as it dropped which is 756 feet.
He missed 5 targets because if you multiply 15 by 5 you get 75
Step-by-step explanation:
Initial volume is given by,
V = A× h
When the height is increased by 10%, new height i.e h'




Similarly ,when the area of the base reduced by 10%, new area i.e A'


Therefore, new volume V'
V'= A'h'



optionA