AP ICET 2017 Shift 1 Paper

Question : 101 of 200

Marks: +1, -0

A piece of work can be completed by A. B and C independently in 15 hours. 12 hours, and 10 hours respectively. A and B started the work, and after 4 hours C joined them and completed the work. The time (in minutes) C worked is

Validate

Solution:

Part of work completed by A & B in 4 hours

=4(1/5+1/2)=4(9/60)=3/5

Remaining work

=2/5

Part of work done by A, B & C together in 1 hour

=1/15+1/12+1/10={4+5+6}/60=1/4

1/4

work in 1 hour

∴2/5

work in

4×2/5=8/5

hours

=8/5×60

minutes
= 96 minutes

Go to Question:

Prev Question

Next Question