What is the time bullet take to get at the animal ?

[UNknown 2010]

Homework Statement

A gun designed to shoot with speed 630 m/sec
Find:
a) from which point above the goal must the hunter shoot to catch an animal, if the horizontal distance between them is 700 meter ?
b) What is the max high for the bullet ?
c) what is the time bullet take to get at the animal ?

Homework Equations

The Attempt at a Solution

a) 6 meter
b) I can't solve it but the final answer as written in the book is 1.5 meter I don't know how to find it !
c) 1.1 second

 

[jeffreydk]

I can't tell from the question but is the particle fired from an angle or simply a height above the target in the straight x direction? Nevertheless, any time in projectile motion you are trying to find the maximum height of something the solution is to usually just take the projectile equation for y and find the max of it by setting the derivative equal to 0 and solving; but if there is no angle upward when firing then the max height will obviously be the initial y value.