Question 1123073

amirah Travels by coach from Singapore to Penang which are 700 km apart to visit her grandparents. She returns to Singapore by car at an average speed which is 30 km per hour greater than that of a coach.
i) if the average speed of the car is X kilometre per hour and the time taken for the whole journey is 20 hours formulate an equation in X and show that it reduces to x^2-100x+1050=0
ii) solve equation x ^2-100x+1050=0 
iii) find the time taken for the return journey.
<pre>This was done about a week ago. Why have you reposted it? Wasn't the solution good enough for you? 
<b>SOLUTION HERE =====> Travel_Word_Problems/1122780: <======= SOLUTION HERE</b>