Primary 6 Problem Sums/Word Problems - Try FREE

Score :
(Single Attempt)

Question


John can erect a 100-metre fence in 2 hours.

Tom can erect a 100-metre fence in 4 hours.

Dominic can erect a 100-metre fence in 5 hours.

If all of them work together, how long will it take them to erect a 100-metre fence?

 

Note to students:

If your answer to the above is a mixed number, give your answer as a b/c

The correct answer is : 1`1/19`
hours