A man on a high cliff He threw the stone down at a speed of 10m / s. The stone took 5s before falling to the ground. find the height of cliff

Initial speed: vo=10m/s

Falling time: t=5s

Height: h=vo×t+gt²/2, where g is gravitational acceleration: g=9.81m/s², but we can round it to 10m/s².

Thus we get:

h=10×5+10×5²/2=50+5×5²=50+125=175m

height=175m

real, smaller and upside-down.   so the answer should be b.