Posted by **HELP HELP MNHS** on Monday, December 17, 2012 at 7:20am.

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)

- distance problem -
**Damon**, Monday, December 17, 2012 at 8:09am
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

- distance problem -
**HELP HELP MNHS**, Monday, December 17, 2012 at 4:38pm
sir what do you mean by vt and tt, vc and tc... tnx....

- distance problem -
**imcool**, Tuesday, August 11, 2015 at 7:47am
yeah

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