यदि A और B कोई कार्य 20 दिन में पूरा कर सकते है है A ने अकेले 10 दिन कार्य किया तथा शेष कार्य B द्वारा 25 दिन में पूरा किया गया B अकेले पूरा कार्य कितने दिन मे कर सकता है?
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Here Is Your Answer! :) English answer is on top, Hindi answer is on the bottom.
Step-by-step explanation:
A can complete the whole work in 20 days.
A's 1-day work = 1/20
B can complete the whole work in 25 days.
B's 1-day work = 1/25
5/20 + 5/25 + x/20 = 1
1/4 + 1/5 + x/20 = 1
(5 + 4 + x)/20 = 1
9 + x = 20
x = 20 - 9
x= 11 days
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