A worker receives an exposure of 90 mR per week at a distance of 100 cm. from a radiation source. What will the new weekly exposure be if a worker were able to move to a 300 cm distance?
- Seperate your distance and your MR, and cross place. So your 90 Mr @ a distance of 100 cm would be crossed from one and other while the xmr and 300 would be crossed.
- 90 mr = 300x 100
- Now remember everytime you are looking for distance, distance is always squared so now the problem looks like:
- 90 mr=90000x =10000
Now cross multiple. So you would multiple your 90mr X 10,000 and the x X 90000.
Resulting in 90000x =900000
Now in order to get the factor of the X, you need to divide out the number attached to the x, so you would divide 900000 by 90000.
Your answer than becomes x=10