The efficiency of a is thrice of b and
half of c. if b alone completes a
work in 45 days, in how many days
can a along with c complete the
same work?
select one:
5 days
15 days
7.5 days
30 days

5 days

Step-by-step explanation:

Number of days taken by B for completion of the work = 45 days.

Efficiency of A is thrice that of B hence he will complete the same task in rd time of B

Hence number of days A takes to finish the same job =  = 15 days.

Also

Efficiency of A is half that of C , Hence C takes half the time A takes to finish the job. Hence number of days taken by C to Finish the same job =  days

Now,

Amount of work completed by A in a single day =

Amount of work completed by C in a single day =

If A and C works together the amount of work completed =  

=

=

Hence the number of days taken to finish the job together by A and C = 5 days

50.6

step-by-step explanation: