after working for 6 days , david was joined by moore . together they completed the remaining job in 3 days . how many days will it take both of them to complete the entire job , given that it would have taken david 12 days to complete the job alone ?
explanation : david and moore complete half work in 3 days = > they can complete whole work in 6 days answer : option c
multiply(divide(12, 6), 3)