(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

P1

We put 4000 USD per year into a savings bank at the beginning of the year for 10 years. After 10 years we take out 4000 USD each year. How much money will there be left in the account by the end of twenty years, if the rate of interest is 5%?

P2

A train departed from city A to town B 180 km away at 9 in the morning. Tom arrived at the railway station late, therefore he weant from A to B by car. He arrived at B the same time as the train. The average speed of the car was 40 km/hours more than the average speed of the train. When started Tom from A?

2. Relevant equations

3. The attempt at a solution

These are two word problems I have difficulty with.

P1

I can calculate this year by year, add up the total and give an answer to the question. However, I feel this is not the way they will want me to do it. Is there any way to put this into formula? I have tried several things including a geometric sequence but it does not seem to add any more value then the line-by-line approach.

P2

I actually sent in this problem to some "Dr. Math" website that helps with math problems. I tolld them the following:

V = velocity of the train

V+40 = velocity of the car

9+(180/V)=x+(180/(V+40)) - two variables here, can't solve x

This is the closest I come to breaking the problem down into an

(solveable) equation.

I've tried other options but I always keep having two variables.

They sent me a reply saying that this one could not be solved without more information. Just wanted to check with the pro's here whether that is correct.

Thanks!

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# Homework Help: Q7 - Two words problems

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