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AND Problems of two Groups (in Hindi)
Mam, How do we solve this problem! A, B and C can do a piece of work in 20, 30 and 60 days respectively. In how many days can A do the work if he is assisted by B and C on every third day?
Harpreet Kaur
5 months ago
Assume total units as lcm of 20,30, 60 Then calculate per day unit work of A,B and C Then according to question, check in 3 days how many units are completed, as the set of 3 days is repeated where A is working for all 3 days and B and C are working on third day only Like here total work = LCM is 60 units A can do 60/20 = 3 units/day Similarly B = 2 units/day C = 1 unit/day In 3 days A can do 9 units While B and C worked on third day = 3 units Total 12 units are completed in 3 days And for 60 units no. Of sets of 3 days will be = 60/12 = 5 5 sets of 3 days means = 15 days
Sadiq S
5 months ago
Thank you so much Mam