if a certain number of people can dig earth 100 m deep , 25 m long , and 30 m broad in 12 days , then find the number of days the same number of people will require to dig earth 75 m deep , 20 m long and 50 m broad .
explanation : more number of days means – more length , more depth and more width . hence , it ’ s a direct proportion . ( 100 * 25 * 30 ) : ( 75 * 20 * 50 ) : : 12 : x 75000 : 75000 : : 12 : x x = 12 answer a
divide(multiply(multiply(multiply(100, 25), 30), 12), multiply(multiply(75, 20), 50))