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## Homework Statement

"A stone is thrown vertically upwards from the top of a building 29 metres high at an initial speed of 11 metres/sec. How long (in seconds) will it take the stone to hit the ground? The height at any time is given by

s = 29 + 11*t – 4.9*t2.

Give your answer correct to one rounded off decimal place (but don't round off as you work the problem), eg., 4.37 becomes 4.8."

## Homework Equations

-29 = 11t - 4.9t^2

t(11 - 4.9t) = -29 <<< Do I do this? Do I need it?

## The Attempt at a Solution

The answer is 3.801, but how do I get this?

Please help me