Question

A machine can fill a box with twenty pencils in 30 seconds. How many boxes can the machine fill in 2 hours? A) 2 boxes B) 120 boxes C) 240 boxes D) 2400 boxes

Answer 1

20 : 30

x : 7200

∴(20*7200)/30=4800

Explanation:

20 pencils is to 30 seconds so x is to 7200(2 hours is seconds) then cross multiply and lastly divide 144000 by 30 to get the answer