Here's the question you clicked on:
virtus
At the Easter Show, there is a new game in which a small hoop pf radius 100mm is thrown onto a rectangular table 3 meters by 2 meters. If the hoop lands so that no part of it extends past the edge of the table, no prize is won. (In the diagram, hoops A, B and C would win prizes but hoops D and E would not)
Assuming that the hoop lands on the table, what is the probability of winning a prize with one throw?|dw:1342695829552:dw|
radius of hoop = 100 mm = 0.1 m
|dw:1342696184502:dw|
|dw:1342696304976:dw|
so that strip of 0.2 m around the table is bad area ?
|dw:1342696662814:dw|