Question

a shell is fired upwards with the velocity 10m/s from a trolley moving horizontally with a velocity 15m/s a person on the ground observes the motion of the shell as a parabola whose horizontal range is?

Answer 1

let the horizontal is x-axis
and vertical is y-axis

then net velocity of the shell
v = 15i + 10j

time of flight
t = 2(10/g) = 2sec

so the range is
15×2 = 30m

hope it helps you
@di