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Question 81
What is the speed of the car?
I. The speed of a car is 10 (km/hr) more than that of a motorcycle.
II. The motorcycle takes 2 hr more than the car to cover 100 km.
Solution
Let the speed of the car be x.
Using both the statements, we get a quadratic equation in x.
This equation will have 2 roots, one positive root and one negative root. So, we have to consider only the positive root.
The question can, therefore, be answered by using both the statements together.
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