Question

Insects known as walking sticks move very slowly. They can move 2 inches every 5 seconds. At this rate, how far could a walking stick go in 30 seconds?
___inches.

Answer 1

2/5 = x/30......2 in to 5 sec = x in to 30 sec
cross multiply
5x = 60
x = 60/5
x = 12 inches <==

Answer 2

Since they go 2 inches every 5 seconds, that means for every 10 seconds the walking stick moves 4 inches. Since 10*3=30 4*3=12.

So in 30 minutes the walking stick moves 12 inches.