Question

Manish can complete a work in 21 days and karan can complete the same work in 28 days.If both together work for 7 days ,then what fraction of total work is left​

Answer 1

Answer: 5/12

Hope its helpful

Answer 2

Answer:

5/12

Step-by-step explanation:

Time taken by manish to complete work = 21 days

Therefore manishs 1 day work = 1/21

Time taken by Karen to complete work = 28 days

Therefore karana 1 day work = 1/28

Manish and karana 1 day work = 1/21 + 1/28

= 1/12

Therefore karan and manishs 7 day work = 1/12 ×7 =7/12

Remaining work = 1 (12/12) - 7/12 = 5/12

HOPE THIS HELPS...