) andapplying the formula for infinite G.P. Here, a=280,r=
4
5
⇒a1−r=
280
1−
4
5
=1400 Now since the ball travels any distance twice, once up and next down we take 2(1400) = 2800. Hence, total distance travelled by the ball before it comes to rest = 2800 + 350 = 3150 meter.