A Truck covers a distance of 150 km at a certain average speed and then covers another distance of 200 km at an average speed which is 20 km per torch more than the first speed . if the truck covers the total distance in 5 hours , find the first speed of the truck.



Let the speed of truck be xkm/hr.
more than speed will be (x+20)km/hr
acc.to que;
150/x +200/x+20 = 5
you will get 2 values of x