Question: 4. A missile fired from ground level rises x metres vertically upwards in t seconds and, x= 80t - 10t2. Find (a) the initial

4. A missile fired from ground level rises x metres vertically upwards

4. A missile fired from ground level rises x metres vertically upwards in t seconds and, x= 80t - 10t2. Find (a) the initial velocity of the missile, (b) the time when the height of the missile is a maximum, (c) the maximum height reached and (d) the velocity with which the missile strikes the ground.

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