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Liono4ka [1.6K]
3 years ago
5

A bus traveled on a level road for 3 hours at an average speed 20 miles per hour faster than it traveled on a winding road. The

time spent on the winding road was 3 hours. Find the average speed on the level triad if the entire trip was 252 miles
Mathematics
2 answers:
BabaBlast [244]3 years ago
7 0

Answer:

65 mph on level road

Step-by-step explanation:

Set b as average speed on the level road  and (b-20) = average speed on the winding road

Distance = speed * time  

Level Road distance + winding road dististance = 285 miles

Substituting b and (b-20), we have,

3b + 2(b-20) = 285

3b + 2b - 40 = 285

5b = 285 + 40

5b = 325

b= 325/5

b = 65 mph on level road

dem82 [27]3 years ago
3 0

Answer: 52 mph

Step-by-step explanation:

Assume the following :

a = average speed traveled on level road

(a - 20) = average speed traveled on winding road

Recall:

Distance = speed × time

Total distance traveled :

Level road distance + winding road distance = 252 miles

3a + 3(a - 20) = 252

3a + 3a - 60 = 252

6a = 252 + 60

6a = 312

a = 52 mph on a level triad

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