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## Homework Statement

An object is dropped from a tower. if it had been thrown down at 60m/s, it would have taken half the time. What is the height of the tower? (Use gravity as 10m/s

^{2})

Givens

Acceleration = 10m/s

^{2}

v

_{1}= 0m/s (not sure)

v

^{2}= 60m/s

time = t/2

## Homework Equations

d=v

_{1}*t+(1/2)*a*t

^{2}

## The Attempt at a Solution

I tried doing the questions, but i don't understand.

The correct answer is 320m, but i don't know how to get to it.

Any help is appreciated.

Thanks