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WebsWeWeave
Two cars drive in the same direction along a straight road, at a constant speed - one at 70 km/hr and the other at 80 km/hr. Assuming that they start at the same point and at the same time, how much sooner would the faster car arrive at a destination 460 km away? a. 49 minutes c. 5.75 hrs b. 6.6 hrs d. 741 minutes
only if your assumption of them starting at the same point and time is correct if its wrong then we dont know....
Joe is on a cross-country trip from New York to Los Angeles. He drives for 45.0 min at 70.0 km/h, 10.0 min at 95 km/h, and 30.0 min at 55.0 km/h, and he spends 20.0 min eating lunch and buying gas. What is the average speed for this part of his trip? a. 67.6 km/h c. 54.7 km/h b. 68.4 km/h d. 53.8 km/h @soty2013
D.) 741 minutes is not correct.
460 / 80 = 5.75 hours 460 / 70 = 6.5714285714285714285714285714286 hours 6.5714285714285714285714285714286 - 5.75 = 0.82142857142857142857142857142857 0.82142857142857142857142857142857 * 60 = 49.285714285714285714285714285714 minutes. The answer is A.