Can someone find out the speeds of these/ how do i find the speed of something

I have to find the speed of 3 things for science and I forget how to do it. Can someone help me?
The questions are any find the speed of something dropped at a height of 4m 60cm if
1) it dropped in 1.76 seconds and weighed 50g
2) it dropped at 1.16 seconds and weighed 150g
3) it dropped at 1.25 seconds and weighed 100g

thanks!

speed = distance / time
it has nothing to do with weight.