Height of the body from the ground can be calculated by using the formula
`h=-"gt"+(1//2)"gt"^(2)` in
a)A body projected vertically with velocity 'u' from the top of tower,reaches the ground in 't' sec.
b)A body dropped from a balloon moving up with uniform velocity,reaches the grounf in 't' sec
c)A body dropped from a helicopter moving up with uniform velocity ,reaches the ground in 't' sec
d)A body projected vertically from the ground reaches the ground in 't' sec.

Options

A. a,b and c correct
B. a,b,c and d are correct
C. a is only correct
D. b and d are correct

Answer

A