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| Math Central | Quandaries & Queries |
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Question from Jamal: A man drives from Ibadan to Oyo a distance of 48km in 45 minutes. If he drives at 72km/h where the surface is good and 48km/h where the surface is bad. Find the number of kilometers of good surfaces |
Hi Jamal,
I can help get you started. I would start by letting the distance travelled on good surface be $x$ kilometers. Then ask how long the man travels on good surface? To answer this invert the speed he travelled on these roads to see 72 kilometers per hours as $\large \frac{1}{72}$ hours per kilometer.
Does this help?
Penny
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