hello people, very basic problem

ruviol

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Nov 15, 2019
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here is what my 5th grader was asked to solve:
tatiana and her family are driving to florida. they traveled 204 miles in 3 hours. at this rate, how many miles will they travel in 7 hours
a-577 miles
b-1,428 miles
c-476 miles
d-68 miles
my son answered 476 miles. but teacher said it was wrong.
the teacher said 1,428 is the correct response.

wth??
 
here is what my 5th grader was asked to solve:
tatiana and her family are driving to florida. they traveled 204 miles in 3 hours. at this rate, how many miles will they travel in 7 hours
a-577 miles
b-1,428 miles
c-476 miles
d-68 miles
my son answered 476 miles. but teacher said it was wrong.
the teacher said 1,428 is the correct response.

wth??
If your post is correct, then your son is correct.

But somebody should tell Tatiana's mom/dad to slow down (unless they are driving in Nevada).
 
The teacher would be right if they traveled 204 miles in 1 hour. But that's not what the problem says and I wouldn't call it driving.
 
here is what my 5th grader was asked to solve:
tatiana and her family are driving to florida. they traveled 204 miles in 3 hours. at this rate, how many miles will they travel in 7 hours
a-577 miles
b-1,428 miles
c-476 miles
d-68 miles
my son answered 476 miles. but teacher said it was wrong.
the teacher said 1,428 is the correct response.

wth??
Clearly the teacher is wrong. If Tatiana drove for 9 hours, then she traveled for 3*204 = 612 < 1428.
 
If they drove 204 miles in 3 hours then in 7 hours they drove (7/3)(204)= 7(68)= 476 miles. You could also calculate that they were driving at 204/3= 68 miles per hour.
 
Clearly the teacher is wrong. If Tatiana drove for 9 hours, then she traveled for 3*204 = 612 < 1428.
From where did you get that?
Since 9>7 one would expect that you would have driven further in 9 hours, than 7 hours! I picked 9 hours since it is larger than 7, the miles driven was easy to compute and the miles for 9 hours was less than the miles the teacher got for 7 hours.
 
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