How does one solve this rate problem

Expert replies

SachinLouis: Newbie | Next Rank: 10 Posts; Posts: 1; Joined: Thu Dec 10, 2009 5:01 pm

by SachinLouis » Thu Dec 10, 2009 5:06 pm

A water tap fills a cylinderical tank at the rate of 3 cc ft/m. Now if the cylinnder fills at the rate of 0.1 ft/m then what is the radius of the cylinder.
(Note I do not have the answer options)

Like this post

Source: Beat The GMAT — Problem Solving | Thu Dec 10, 2009 5:06 pm

qazpt: Newbie | Next Rank: 10 Posts; Posts: 9; Joined: Thu Dec 10, 2009 3:04 pm; Thanked: 2 times

by qazpt » Thu Dec 10, 2009 10:46 pm

here is an approximation

write down the formula for a cylinder
area = height ( area of a circle)
= H ( pie r^2)

next since 3 cc/ft = .1 ft then 30cc = 1

plug in for 1 h

30cc = 1 (pie r^2)
30 = 3.14 r^2
10 = around r^2

3*3 = 9

r is approximately 3

Like this post

aspirant1: Senior | Next Rank: 100 Posts; Posts: 38; Joined: Mon Nov 23, 2009 9:52 am; Thanked: 3 times

by aspirant1 » Fri Dec 11, 2009 8:03 am

thats well done qazpt

Like this post

Post new topic Post Reply

• Page 1 of 1

GMAT Course Reviews

560 reviews

1168 reviews

431 reviews

359 reviews

147 reviews

5/5

5 Star (560 Reviews)

"Target Test Prep is the closest to the official version of the GMAT exam, about 99% accuracy in terms of the quality and quantity of information. The course has excellently created singular sets of focused lessons and tests for every possible topic that one could come across in the official GMAT exam."

"The TTP course maximizes the efficiency of the time you spend studying. It will take time and effort but I could almost guarantee that if you complete the course exactly as it is laid out you will get an amazing score. They also have a very responsive team willing to help with any questions you might have."

"TTP has two things that I think no other test prep company offers: A teaching approach that reinforces understanding and an attitude that will give you the mental preparedness needed to succeed on the test. TTP gives you a deep understanding of the concept you need to know while teaching you how to think."

Write a Review