Question

The distance that an automobile travels varies directly as the time it travels. If the car travels 280 miles in 7 hours, how far will it travel in 12 hours?
answers could be either
1960
480
84
25

Answer 1

280 divided by 7 equals 40 and forty times 12 equals 480 so the answer is 480

Answer 2

The distance travelled in 12 hours is 480 miles

If the distance that an automobile travel varies directly as the time it travels, this is expressed as:

s = kt

Given that s = 280 miles and t = 7hours

280 = 7k

k = 280/7

k = 40mi/hour

If the automobile travels in 12 hours;

s = 40 * 12

s = 480 miles

Hence the distance travelled in 12 hours is 480 miles

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