Drops of water fall from the roof of a building 9 m highat regular intervals of time, when the first drop reaches the ground at the some instnat the fourth drop starts its fall. What are the distnaces of the second and third drops from the roof ?

Options

A. 6 m and 2 m
B. 6 m and 3 m
C. 4 m and 1 m
D. 4 m and 2 m

Answer

C

Explanation

Time taken to reach the drop to ground
`9=0+1/2xx10xx(3t)^(2)`
`sqrt(9/5)=3t`
`sqrt(1.8)/3=t`
`x_(2)=1/2xx10xx(2t)^(2)=20t^(2)=20xx1.8/9=4 m`
`x_(3)=1/2 xx10xx(t)^(2)=5t^(2)=5xx1.8/9=1m`