Question

class 8 A, Band C can polish the floor together in 4 days. B Alone can polish it in 10 days and C alone can polish it in 12 days In how many days will A do this work alone​

Answer 1

Answer:

A and B can polish a building in = 10 days A alone can do 1 /4 14th of it in 12 days (A+B)’s 1 day work = 1 /10 =110 A’s I day work = 1/ 4 × 12 = 1 /48 =14×12=148 B’s 1 day work = (A+B)’s 1 day work – A’s 1 day work = 1/ 10 − 1/ 48 = 38 480 = 19 240 =110−148=38/480=19/240 Thus B can finish the work in = 1 19 240 = 240 19 = 12 12 19 =1/19/240=240/19=12 12/19 days.