Question

10 workers can make a machine in 15 days. 5 more workers join after 3 days.find the total number of days in which the machine will be prepared.

Answer 1

Answer:4 days

Step-by-step explanation:·

people             days

10             -             15

days left after 3 days=12

therefore 10 men in 8 days

thereby 1 man take 80 days

after 3 days 5 workers join

so total workers= 15

∴60/15 = total days=4 days

Answer 2

Answer:

Total number of days = 11

Step-by-step explanation:

Remaining days left for completion of the machine => 15-3= 12

So if 10 men worked for 12 days

Then, Work done by them in 12 days => 12*10= 120

Now, this part (120) of the work will be done by (10+5=15) men

So, no of days required for completion of the same work=> 120/15= 8

Now total no of days required for completion of the work = 8+3 = 11 days (since, previously 3 days of work was done)