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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;
What do you use for the common denominator?

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

Thanks, now I see. It's always these kinds of problems that just mess up my Quant score

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

No, I posted the correct answer right under it. "F(x) = -3x"

by RickH

Mon Aug 16, 2010 4:52 am
Forum: Problem Solving
Topic: Function Problem
Replies: 3
Views: 1049

That Sounds about right.

by RickH

Sun Aug 15, 2010 8:16 pm
Forum: Problem Solving
Topic: Water Pump Problem
Replies: 13
Views: 4176

If i remeber correctly the correct answer should be 24:25.

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

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