DanaAJames
New member
- Joined
- Oct 29, 2014
- Messages
- 22
I know the Pythagorean theorem for the last part. I am not 100% sure with the other parts. Here is the problem:
Marty and Rediat got in a fight. They walked away from each other on seperate paths at a right angle to each other. Marty walks at 2 km/hr for 20 minutes, then stops to think. Rediat walks 3 km/hr for 30 minutes then he stops to think. Then, suddenly, they both want to apologize and they start running for each other. How far apart are they? How long will it take for them to reach eachother if they run straight at eachother at 5 km/hr?
What I did is I put 20 minutes over 60 minutes to get the fraction of 1/3 for Marty. Then I multiplied that times 2 (because 2 km/hr) and got (1/3 * 2 = 2/3)km.
For Rediat, 30 minutes over 60 minutes, for fraction of 1/2 for Rediat. Then, I multiplied that times 3 (for 3 km/hr) and got (1/2 * 3 = 3/2)km.
Then, since it is a right triangle, I did a2+b2=c2
2/32 + 3/22= c2
So, 4/9 + 9/4 = c2
√97/36=√c2
√97/36=c
Now, I need to find the square root of 97/36 which is 1.6414763003.
Is this right? If so, how do I complete the problem (including the 5 km/hr part). If not, how do I do it correct?
Marty and Rediat got in a fight. They walked away from each other on seperate paths at a right angle to each other. Marty walks at 2 km/hr for 20 minutes, then stops to think. Rediat walks 3 km/hr for 30 minutes then he stops to think. Then, suddenly, they both want to apologize and they start running for each other. How far apart are they? How long will it take for them to reach eachother if they run straight at eachother at 5 km/hr?
What I did is I put 20 minutes over 60 minutes to get the fraction of 1/3 for Marty. Then I multiplied that times 2 (because 2 km/hr) and got (1/3 * 2 = 2/3)km.
For Rediat, 30 minutes over 60 minutes, for fraction of 1/2 for Rediat. Then, I multiplied that times 3 (for 3 km/hr) and got (1/2 * 3 = 3/2)km.
Then, since it is a right triangle, I did a2+b2=c2
2/32 + 3/22= c2
So, 4/9 + 9/4 = c2
√97/36=√c2
√97/36=c
Now, I need to find the square root of 97/36 which is 1.6414763003.
Is this right? If so, how do I complete the problem (including the 5 km/hr part). If not, how do I do it correct?