Question

A scanner can scan 20 pages and 120 seconds. How many pages can scan in 4 minutes?

Answer 1

40 pages

Explanation:

convert 4 mins -> 240 secs

then cross multiply 20/120 and x/240 (x represents the pages scanned)

u then get 120x=4800

simplify(divide)-> x=40

Answer 2

40 pages

Explanation:

120 or 2 min x 2 = 4

20 x 2 = 40

Sorry I couldn't explain more, but I hope this helps!