vc = vt + 20
tc = tt - 3
360 = vc tc = (vt+20)(tt-3)
360 = vt tt so tt = 360/vt
360 = (vt+20)(360/vt - 3)
360 vt = (vt+20)(-3 vt +360)
360 vt = -3 vt^2 -60 vt + 360 vt + 7200
3 vt^2 + 60 vt -7200 = 0
vt^2 + 20 vt - 2400 = 0
(vt+60)(vt-40) = 0
vt = 40
A car travels 20 km/h faster than a truck. The car covers 360 km in 3 hours less time than the truck.Find the speed of the truck.
(kindly write the solution, thanks alot)
3 answers
sir what do you mean by vt and tt, vc and tc... tnx....
yeah
3 answers