Question

two friend decided to calculate the height of high rise building they match the timing of their watch one friend goes to top storey and and other friends stand on ground throws stone down when they meet they found that the time taken by stone is 3s find height of high rise building (hint s=ut +1/2 at 2)​

Answer 1

Explanation:

Given:-

$u = 0$

$t = 3 \: sec$

To find:-

height of the building

as we know

$h = ut + gt ^{2} \div 2$

putting the values,

$h = 0 \times 3 + 10 \times 3 \times 3 \div 2$

$h = 5 \times 3 \times 3$

$h = 45 \: m$

so the height of building is 45 m

Answer 2

Explanation:

h=ut+1/2at²

h=0×3+10/2×3×3

h=0×5×3×3

h=45m ans