Final answer:
The sports announcer can say 210 words per minute, calculated by multiplying the 70 words he can say in 1/3 of a minute by the 3 sets of 1/3 minutes in a full minute.
Step-by-step explanation:
To find out how many words the sports announcer can say per minute, we need to determine the number of words he can say in a full minute if he can say 70 words in 1/3 of one. First, we need to find out how many sets of 1/3 minutes are in one full minute. Since there are 3 sets of 1/3 in a full minute, we multiply the number of words the announcer can say in 1/3 of a minute by 3 to get the rate per full minute.
Number of words per minute = (Words in 1/3 minute) × (Number of 1/3 minutes in a full minute) = 70 words × 3 = 210 words per minute.
So, the sports announcer can say 210 words per minute.