Choose the correct unit of length (cm,m or km) for the following :

Length of a road.

Choose the correct unit for the following :

length of a book.

 Choose the correct unit of length (cm,m or km) for the following :

Length of a wrist watch.

Choose the correct unit for the following :

Length of an eraser.

Choose the correct option that estimates the height of the tree ?

Choose the correct unit of length (cm,m or km) for the following :

length of curtain cloth.