Thus Batu Arang played an important role in the Malayan economy by introducing electricity to the Malayan state and improving tin mining through dredges, which outpaced Asian methods of mining tin. Coal production peaked in 1940, when Batu Arang produced 781,509 tons of coal.
Batu Arang's impact on the Malayan economy was substantial, as he brought electricity to the region and enhanced tin mining through the use of dredges, which were more efficient than Asian methods for extracting tin. Coal production reached its highest point in 1940, with Batu Arang contributing 781,509 tons of coal.