Benny can stack 42 cups in 24 seconds. Does this mean he can stack 70 cups in 40 seconds?

1 Answer
Mar 4, 2018

Yes, if he keeps stacking the cups at the same rate.

Explanation:

4242 in 2424 seconds
7070 in 4040 seconds

To examine weather this statement is true or not, just do the cross multiplication:

42*40=24*704240=2470
1680=16801680=1680

Therefore, given that he keeps stacking the cups at the same rate, the statement is true.