The fastest train in the world moves at 300,000 km/s. how far will it go in three hours?

(300,000 km/s) x (3,600 sec/hr) x (3 hrs) = 3,240,000,000 km.

                                                                 (That's 3.24 x 10⁹ km.)

                       (That's to the moon and back about 4,230 times.)



The math above is bullet-proof and air-tight.
The reason for the whacky answer is the fact that
the fastest train in the world does not move at
anywhere near 300,000 km/sec.  That number
is the speed of light, for gosh sakes !

Initial velocity,  u = 4.9 m/sfinal velocity = v m/sinitial height,  h₁ =  245 m    final height, h₂ = 0a = -9.8  m/s²time taken = t secondss = ut + 0.5at²⇒  (h₂-h₁) = ut + 0.5at²⇒  0-245 = 4.9t + 0.5×(-9.8)×t²⇒ -245 = 4.9t - 4.9t²⇒ 4.9t² -4.9t -245 =0solving it, we get   t = 7.59sv  = u +  at = 4.9 -9.8×7.59 = 4.9 - 74.38 = -69.48 m/svelocity is  69.48 m/s downward

Answer form flower;