What is a resonable estimate of the wieght of the cans if it holds 21 cans?

Question

brooke brought a box of cans to contribute to her school's canned food drive. the smallest can weighed 9 oz , the largest can weighed 36 oz.

 

Answer 1

A really crude estimate is to figure that the average weight per can might be (36 + 9)/2 = 22.5 oz and the multiply by 21.