Question

Please answer this question quickly....

Correct answer will be marked as brainliest!!!​

Answer 1

Answer:

b) 20 second.

Explanation:

MARK AS BRAINLIST

Answer 2

Answer:

b) 20 sec

Step-by-step Explanation:

Given that

g = 10 m/s

u = 100 m/s

Timetaken to strike:

$t = \frac{2u}{g}$

$t = \frac{200}{10}$

$t = 20 \:{s}$