a can complete a certain job in 19 days . b is 90 % more efficient than a . in how many days can b complete the same job ?
"let , total work unit = 190 units a can finish in 19 days = 190 unit work i . e . a can finish in 1 days = 10 unit work i . e . b can finish in 1 days = 10 + ( 90 / 100 ) * 10 = 19 unit work days in which b will complete the work alone = 190 / 19 = 10 days answer : option e"
divide(multiply(19, 90), const_100)