Search found 46 matches
What do you use for the common denominator?vijaynaik wrote:[rate pump1 + rate of pump2 ] = 1/T;
1/x + 1/1.5x = 1/4;
x = 20/3;
so the faster pump can do it in 1.5 * 20/3 = 10 hrs;
- by RickH
Mon Aug 16, 2010 5:13 am- Forum: Problem Solving
- Topic: Water Pump Problem
- Replies: 13
- Views: 4176
- by RickH
Mon Aug 16, 2010 4:57 am- Forum: Problem Solving
- Topic: Geometry Problem
- Replies: 7
- Views: 1373
- by RickH
Mon Aug 16, 2010 4:57 am- Forum: Problem Solving
- Topic: Lumber Yard Problem
- Replies: 7
- Views: 3651
- by RickH
Mon Aug 16, 2010 4:55 am- Forum: Problem Solving
- Topic: Arithmetic Sequence Question
- Replies: 2
- Views: 1082
- by RickH
Mon Aug 16, 2010 4:52 am- Forum: Problem Solving
- Topic: Function Problem
- Replies: 3
- Views: 1049
- by RickH
Sun Aug 15, 2010 8:16 pm- Forum: Problem Solving
- Topic: Water Pump Problem
- Replies: 13
- Views: 4176
- by RickH
Sun Aug 15, 2010 8:15 pm- Forum: Problem Solving
- Topic: Geometry Problem
- Replies: 7
- Views: 1373
Function Problem
Please help me with the following problem:
For which of the following functions F(a+b) = f(a) + f(b)?
Answer: F(x) = -3x????
Thanks
- by RickH
Sun Aug 15, 2010 7:10 pm- Forum: Problem Solving
- Topic: Function Problem
- Replies: 3
- Views: 1049
Lumber Yard Problem
Please help me with the following problem:
In a stack of boards at a lumber yard, the 20th board counting from the top of the stack is immediately below the 16th board counting from the bottom of the stack. How many boards are in the stack?
I always get 36 but it should be 34?
- by RickH
Sun Aug 15, 2010 7:09 pm- Forum: Problem Solving
- Topic: Lumber Yard Problem
- Replies: 7
- Views: 3651
Water Pump Problem
Please help me with the following problem: Two Water pumps working simultaneously at their respective rates, took exactly 4 hours to fill a certain swimming pool. If the constant rate of one pump was 1.5 times the constant rate of the other, how many hours would it have taken the faster pump to fill...
- by RickH
Sun Aug 15, 2010 7:08 pm- Forum: Problem Solving
- Topic: Water Pump Problem
- Replies: 13
- Views: 4176
Geometry Problem
Please help me with this problem:
The perimeter of square region S and rectangular R are equal. If the sides of R are in the ratio 2:3 what is the ratio of the area of Region R to the Region S?
Thanks!
- by RickH
Sun Aug 15, 2010 7:08 pm- Forum: Problem Solving
- Topic: Geometry Problem
- Replies: 7
- Views: 1373
Arithmetic Sequence Question
Please help me with this problem:
In the arithmetic sequence t1, t2, t3, ..., tn,..., t1 = 23 and tn = tn-1 - 3 for every n>1. What is the value of n, when tn = -4?
Thanks!
- by RickH
Sun Aug 15, 2010 7:07 pm- Forum: Problem Solving
- Topic: Arithmetic Sequence Question
- Replies: 2
- Views: 1082
- by RickH
Sun Aug 15, 2010 7:06 pm- Forum: Problem Solving
- Topic: Couple Problems I don't seem to be able to solve
- Replies: 4
- Views: 1621
I just realized something for my last questions on #6: Since the time is given in minutes, but the speed is on miles PER HOUR, I would need to set everything up in hours correct? Meaning like this: 0.5 = Distance/40 20 = Distance Beth would then be the following: 5/6 = 25/S 5/6S = 25 S = 30 Which wo...
- by RickH
Sun Aug 15, 2010 4:14 pm- Forum: Problem Solving
- Topic: Couple Problems I don't seem to be able to solve
- Replies: 4
- Views: 1621
Couple Problems I don't seem to be able to solve
I have a few problems that I encountered today that I don't seem to be able to solve. Please help me out. #1 In the arithmetic sequence t1, t2, t3, ..., tn,..., t1 = 23 and tn = tn-1 - 3 for every n>1. What is the value of n, when tn = -4? #2 The perimeter of square region S and rectangular R are eq...
- by RickH
Sun Aug 15, 2010 4:12 pm- Forum: Problem Solving
- Topic: Couple Problems I don't seem to be able to solve
- Replies: 4
- Views: 1621