1.

uu I 10 morelc 7 hours to cover a certain distance at the sped of 4s km/hr I the spetlhiewere added tuo uicin.t7. A car takeshowmuch time will it take to cover the same distance?

Answer»

Let the distance be X from question , x = 7*48 = 336km now if the speed is decreased by 20km/h , the new speed is 48-20 = 28km/h so the time will be T*28 = 7*48 => T = 48/4 = 12hrs.



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