You can make time the subject of the equation Since time is dividing, you can multiply both sides of the equation by time to cancel the time at the right hand side Time × Speed = Distance Divide both sides by Speed From the question, distance covered =150km Speed was 18km∕h Time =150∕18 3 goes into 150, 50 times and 18, 6 times Time =50∕6 2 goes into 50, 25 times and 6, 3 times Time =25∕3
3 can go into 25,8 times remainder 1 Time =81∕3 hours, thus 8 whole number 1 over 3 You can change the fraction part of the hours to minutes by multiplying by 60 minutes. There are 60 minutes in an hour 1∕3 hours =1∕3×60 minutes =20 minutes Therefore the time taken is 8 hours 20 minutes