SOLUTION: Amirah travels by coach from Singapore to Penang, which are 700km apart, to visit her grandparents. She returns to Singapore by car at an average speed which is 30km/h greater than

Question 1125450: Amirah travels by coach from Singapore to Penang, which are 700km apart, to visit her grandparents. She returns to Singapore by car at an average speed which is 30km/h greater than that of a coach.
(i) If the average speed of the car is x km/h and the time taken for the whole journey is 20 hours, formulate an equation in x and show that it reduces to x�-100x+1050=0

Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39620) (Show Source): You can put this solution on YOUR website!

SPEED TIME DISTANCE Singapore to Penang x-30 700/(x-30) 700 Penang to Singapore (car) x 700/x 700 TOTAL 20

-

----------the equation you wanted
Answer by MathTherapy(10555) (Show Source): You can put this solution on YOUR website!

Amirah travels by coach from Singapore to Penang, which are 700km apart, to visit her grandparents. She returns to Singapore by car at an average speed which is 30km/h greater than that of a coach.
(i) If the average speed of the car is x km/h and the time taken for the whole journey is 20 hours, formulate an equation in x and show that it reduces to x�-100x+1050=0

Why do you keep posting this problem when itw's answered quite a few times, months ago, I believe, as Question 1123073, and Travel_Word_Problems/1122780?
I wish there was a way to throw all of these DUPLICATE questions in the TRASH.
They take away time from other students who desperately need tutors' help, when these DUPLICATES keep getting answered!!
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