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

Mar 4, 2018

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

#### Explanation:

$42$ in $24$ seconds
$70$ in $40$ seconds

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

$42 \cdot 40 = 24 \cdot 70$
$1680 = 1680$

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