Question

A packing operator can assemble 3 cardboard boxes in 7 minutes. At this rate, how many boxes can she assemble in 35 minutes?

Answer 1

Answer:

15 cardboard boxes

Step-by-step explanation:

3 cardboard boxes =7 minutes is equation 1

so, 35 minutes =?

multiply equation 1 by 5

3*5 cardboard boxes=7*5 minutes

15boxes =35 minutes.

hence 15 boxes can be assembled

Answer 2

Answer:

Step-by-step explanation: 3cd boxes = mins

For easy purpose let's convert the mins to secs

7mins= 420 secs

35mins= 2100 secs

So, it takes 420secs for 3cd boxes

Therefore, for 1cd box= 420/3 = 140secs

Since it take 140secs for 1cd box

2100secs= 2100/140

= 15cd boxes

Now, if it takes 7mins for 3cd boxes

It will take 35mins for 15cd boxes