Question

38. If four examiners can examine a certain number of answer books in 8 days by working 5 hours a
day, for how many hours a day would 2 examiners have to work in order to examine twice the
number of answer books in 20 days?
1 6 hours
hours
3 8 hours
4) 9 hours​

Answer 1

Answer:

4e*8d*5h=2e*20d*h

after solving this we get

4hours