3. A grocery store worker has to collect all the shopping carts left out in the parking
lot. He collects 4 carts and measures the length of the 4 carts he is pushing to be
51 inches. He collects another cart for a total of 5 carts and measures the length of
the 5 carts to be 57 inches.
153in
a. He sees that there are a total of 21 carts in the parking lot. How long will the line
of 21 carts be?
b. If he is pushing a line of carts that is 117 inches long, how many carts does he
have?
c. How long is a single cart?
