A teacher can grade 25 papers in 4 hours.

How many papers can he grade in 6 hours?

A.

37.5

B.

31

C.

35

D.

29

25/4 = 6.25

6.25 (6) = 37.5

The teacher can grade 37.5 papers in 6 hours.

Well if she can grade 25 in 4 hours ...

First we have to find out how many she can grade in 1 hour

to find that out you can just divide the papers/hours = the paper per 1 hour

25/4 = 6.25 papers per hour

So then to figure out how many papers the teacher can grade in 6 hours you multiply the number of papers per hour x the number of hours = number of papers in 6 hours

6.25*6 = 37.5 papers in 6 hours

so the answer would be A) 37.5