A stone is dropped from a height of 10 cm above the top of a window 80 cm high. The time taken by the stone to cross the window is (g=10ms^(-2))

A stone is dropped from a height of 10 cm above the top of a window 80

1.	A stone is dropped from a height of 10 cm above the top of a window 80 cm high. The time taken by the stone to cross the window is (g=10ms^(-2))
Answer» `1/7`s `3/7` s `2/7s` `4/7`s Answer :C