Question

There are 2 miners in a mine. Miner 1 mines 19,687 m of ore in one hour. Miner 2 mines 19,687 m of ore in 51 minutes. Find out how much ore Miner 2 mines in 1 hour.

Answer 1

Miner #2 mines 19,687 m (meters ?) of ore in 51 minutes.

That's  (19,687/ 51) m (meters ?) per minute.

There are 60 minutes in one hour.  So if he maintains that same
average rate for a whole hour, he will mine

           (19,687 / 51) x (60)   =   23,161 m (meters) of ore.