Question

A और B किसी काम को क्रमशः 10 और 12 दिन में
कर सकते है, A और B ने साथ मिलकर काम करना
शुरू किया और 3 दिन बाद A ने काम छोड़ दिया। काम
को पूरा होने में कुल कितना समय लगा?​

Answer 1

Answer:

A can complete 100% of work in 10 days

so word done by him in 1 day =10%

" " " " " 3 days=30%

B can complete 100% of work in 12 days

so in one day 100/12%

in 3 days 100/12 ×3=25% of work

now work completed by both in 3 days =30+25=55

remaining work =100-55=45%

so time taken by him to complete 45% of work =1/12 ×45= 45/12 =15/4

so total time taken=3+15/4 days.

Answer 2

Step-by-step explanation:

A+b= 3 days

B=60-33

A=(3x11=33)

B=27

27/5= 5 2/5 days

3+5 2/5

8 2/5