SOLUTION: I have two questions if its ok: 1.) The formula for the volume of a rectangular box is V = lwh. If the length of a box is 22 inches, the height is 7 inches, and the total vol

Algebra ->  Probability-and-statistics -> SOLUTION: I have two questions if its ok: 1.) The formula for the volume of a rectangular box is V = lwh. If the length of a box is 22 inches, the height is 7 inches, and the total vol      Log On


   

Question 106532: I have two questions if its ok:

1.) The formula for the volume of a rectangular box is V = lwh. If the length of a box is 22 inches, the height is 7 inches, and the total volume is 2,310 square inches, find the width of the box.

2.) 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 4 hours. Find the average speed on the level road if the entire trip was 305 miles.
Thank you!

Answer by Nate(3500) About Me  (Show Source):
You can put this solution on YOUR website!
1.) The formula for the volume of a rectangular box is V = lwh. If the length of a box is 22 inches, the height is 7 inches, and the total volume is 2,310 square inches, find the width of the box.
V+=+lwh
2310+=+22%2Aw%2A7
2310+=+154%2Aw
15+=+w the width is 15 inches
2.) 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 4 hours. Find the average speed on the level road if the entire trip was 305 miles.
Distance = Rate*Time
Winding road:
time = 4 hours
rate = r
distance = 4r
Level road:
time = 3 hours
rate = r + 20
distance = 3r + 60
4r + 3r + 60 = 305
7r = 245
r = 35
Level road speed = r + 20 = r + 35 = 55mph