Question

The teacher kept track of how long it took students to finish a test. After 20 minutes, 3 students had finished the test.

How many students were finished after 70 minutes?

Answer 1

Hey there
If 3 students completed after 20 minutes .
Then for 70 minutes
= 20/3×70
= 1400/3
Hope it helps ......

Answer 2

So if they all took the same rate then 
20 minutes=3 students
divideb y 3
6 1/6 min=1 student
multply by 8
48 and 8/6=8 student=49 and 2/6=49 and 1/3 min=49 min and 20 seconds

So , in 70 mins ... 11 students

Hope this will help u... :-)