You lift a heavy book from the floor of the room and keep it in the book–shelf having a height . In this process you take . The work done by you will depend upon 

a) 
Mass of the book and time taken 
b) 
Weight of the book and height of the bookshelf 
c) 
Height of the bookshelf and time taken 
d) 
Mass of the book, height of the bookshelf and time taken 
You lift a heavy book from the floor of the room and keep it in the book–shelf having a height . In this process you take . The work done by you will depend upon 

a) 
Mass of the book and time taken 
b) 
Weight of the book and height of the bookshelf 
c) 
Height of the bookshelf and time taken 
d) 
Mass of the book, height of the bookshelf and time taken 
(b) Work done = Force displacement = Weight of the book Height of the book shelf 