Question

A, B, C
finished
a work 15 ,12,10
Dayes . Both are started
the work. After 2 Days C left the
worck. and B also left
the work
Before 3
days finishing the
work. How many days finished
finished the
work.​

Answer 1

Answer:

D) 7 days

Description for Correct answer:

Description see in the solution no. 169

A leaves before 5 days = 6×5=306×5=30

B leaves before 3 days = 3×5=153×5=15

then total work =60+30+15=10560+30+15=105

total efficiency 6+5+4=156+5+4=15

total days =1051510515 = 7 days