Question

A,b,c have to supply ann orders of 100 pens .a,b,c makes a pen in 2, 3,4 hours respectively.in how many days theywillcomplete the work if one makes a complete pen himself without the help of others

Answer 1

1day=24 hours
a makes a pen in2 hours, b makes a pen in 3 hours,c makes a pen in 4 hours
no. of days required to a to make 100 pens=24/2=12
a makes 12 pens in a day so a makes 100 pens in 8 days 4 hours
no. of days required to b to make 100 pens=24/3=8
b makes 8 pens in a day so b makes 100 pens in 12 days 4 hours
no. of days required to c to make 100 pens=24/4=6
c makes 6 pens in a day so c makes 100 pens in 16 days 4 hours