September 14th, 2016, 04:34 AM  #1 
Member Joined: Aug 2011 Posts: 78 Thanks: 0  Simple Maths Problem
Hi, I am trying to phrase this maths problem easier and have a better understanding of the calculation. It is a rather simple problem which I cannot find an easier solution to. 20 cars pass a house within 10 minutes. Work out how many cars pass the house in a minute. 20/10 = 2 cars per minute So every 30 seconds a car goes past the house. How can I show this as a calculation? Can I go 1 (1 car) /2 (2 cars) * 60 = 30s? Or is there a better way?? If I go 20/600 seconds = 0.03 which is the wrong answer. 
September 14th, 2016, 04:45 AM  #2 
Senior Member Joined: Aug 2016 From: morocco Posts: 273 Thanks: 32 
convert minutes to seconds.

September 14th, 2016, 04:48 AM  #3 
Member Joined: Aug 2011 Posts: 78 Thanks: 0  
September 14th, 2016, 04:54 AM  #4 
Senior Member Joined: Aug 2016 From: morocco Posts: 273 Thanks: 32 
20 cars within 10 mn means 20 cars within 600 s 1 car within 600/20=30 s. 
September 14th, 2016, 05:36 AM  #5 
Member Joined: Aug 2011 Posts: 78 Thanks: 0  
September 14th, 2016, 05:45 AM  #6 
Senior Member Joined: Aug 2016 From: morocco Posts: 273 Thanks: 32 
1 car within 30s =1/30= 0.03333333 car per second but 0.033333 car has no sens. 
September 14th, 2016, 07:11 AM  #7 
Senior Member Joined: Apr 2014 From: UK Posts: 768 Thanks: 290 
I like the original reduction to 2 cars per minute to start with. What's the actual question? I assume it is along the lines of: "What is the average time between the cars passing the house" So, convert 2 cars per minute to: 2 cars per 60 seconds (2/60) reduce to: 1 car per 30 seconds (1/30) since 1 car per 30 seconds is a frequency, we can convert that to a time period because we know that T = 1/f (Time period is 1/frequency) so, 1/(1/30) = 30 
September 14th, 2016, 10:02 AM  #8 
Member Joined: Aug 2011 Posts: 78 Thanks: 0 
Thanks for the help everyone. Really appreciate it. I just got confused in my head about the way to tackle it. Like anything in maths there are numerous ways to tackle a question.

September 14th, 2016, 11:43 AM  #9 
Member Joined: Aug 2011 Posts: 78 Thanks: 0 
Sorry here's an other one in regards to a voucher scheme: 500 voucher points = £5 Every £1 spent = 5 voucher points. Now for the math involved. I've worked out one voucher =£0.01 As Pound per voucher = £5/500 voucher points What's the math involved for £1 spent = voucher points? 500 vouchers/£5 = £100 Voucher per pound 500 vouchers/£100 = 5 vouchers OR 500 vouchers/£5 = £100? So £100/£100 = £1 Is there an other way that is easier lol. Sorry I don't understand how to put it into context. I hate word problems much rather algebra for some reason. I guess I can easily convert this into algebra? Last edited by dthomas86; September 14th, 2016 at 12:29 PM. 
September 25th, 2016, 08:49 AM  #10  
Member Joined: Aug 2011 Posts: 78 Thanks: 0  Quote:
This would give you the seconds per car yes? I've always found division confusion between which number you want as a numerator and denominator when faced with a word puzzle. Is it always what you are trying to find is the numerator? Sent from my iPhone using Tapatalk  

Tags 
maths, problem, simple 
Search tags for this page 
Click on a term to search for related topics.

Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Simple Maths problem?  pupbrown  Algebra  5  May 4th, 2011 01:59 PM 
Simple Maths Question  nick2price  Algebra  4  January 4th, 2011 01:43 PM 
More simple Maths  flipper4738905  Physics  0  July 23rd, 2010 05:54 AM 
problem with what appears to be simple maths  flipper4738905  Physics  4  July 23rd, 2010 05:33 AM 
Simple Maths problem?  pupbrown  Number Theory  5  December 31st, 1969 04:00 PM 