If 5 engines consume 6 metric tonnes of coal when each is running 9 hours a day, how many metric tonnes of coal will be needed for 8 engines, each running 10 hours a day, it begin given that 3 engines of the former type consume as much as 4 engines of the latter type ?

• A. 31831831831831831831831833318181188318
• B. 8
• C. 88988988988988988988988988889898899889
• D. 612256122561225612256122561225612256122566612251225121212122525252561225