Question

A fisherman can knit a big fishing-net in 15 days while
his son can do the same job in 12 days. Together they
start knitting a het but after 5 days the fisherman has to
go out to the sea. How long will his son take to finish
knitting the fishing-net?​

Answer 1

Step-by-step explanation:

Given A fisherman can knit a big fishing-net in 15 days while his son can do the same job in 12 days. Together they  start knitting a net but after 5 days the fisherman has to  go out to the sea. How long will his son take to finish  knitting the fishing-net?

• Given In 15 days a fisherman can knit a big fishing net in 15 days.
• So in one day work done by fisherman will be 1 / 15
• In 12 days his son will be able to do the same job.
• So in one day work done by the son will be 1/12
• So in one day work done by both of them will be
•         1/15 + 1/12
•        = 9/60
•        = 3/20
• So after 5 days work done by both will be
•                 5 x 3/20
•                = 15/20
•                = ¾
• So remaining work will be 1 – ¾
•                                               = ¼  
• So number of days to complete the remaining work by his son will be
•              ¼ / 1/12
•         = 12 / 4
•       = 3 days

Reference link will be

https://brainly.in/question/6402238

Answer 2

Answer:

3days will be the correct answer