Subhrajyoti wrote:
I am not sure i understand. How can sum of speeds define the gap between two moving objects. It tells me how much they have traveled.
The distance here is 285 miles, so the sum of the distance traveled - distance , shouldn't that be distance between them.
There is some gap between them. They travel towards each other for 2 hrs to cover that gap and that is when they meet. Their speeds are fixed at 50 mph and 60 mph.
So in 2 hrs, one of them travels 100 miles and the other travels 120 miles. Together they travel 220 miles in 2 hrs to meet. So the gap between them 2 hrs ago must have been 220 miles.
Say if the gap between them were 330 miles, they would have taken 3 hrs to meet. They would not have met in 2 hrs. 2 hrs happened because the gap between them was 220 miles.
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Karishma
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