Question

Q1. A ball is allowed to fall freely from a certain height. If it covers 20m in the very last second of its journey. Find from what height it is allowed to fall

Q2. A ball is allowed to fall from a height of 80m. At the same another ball is thrown vertically upwards. When and where will they meet.
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Answer 1

h 20 m

t ls

$20 \div 1$

20

h=80m. when they two were meet together