Question

plz give me answer........

A , B and C can complete a work in 5 days. if A and C can complete the same work in 7 1/2 days and A alone in 15 days, then in how many days can B and C finish the work​.

Answer 1

Answer:

let

A and B done work in 5 days

A and C done work in 7 half days

for an average

5day/2 and 7.5day/2

2.5day + 3.75day

6.25day

6 1/4 day taken B and C to finish work

i hope it helpfull to you

Answer 2

Step-by-step explanation:

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↪ A+B= 15

A+ B+C= 8

A+B= 15A+ B+C= 8

Total work= 25*8= 120

So, (A+B+c)= 15unit/day,

and (B+c)= 8 unit/day.

Hence, C=7 unit/day;

so, C= 120/7 days.

And, A+C= (B+C)+2 days, since tot. work is 120,this means A+C= 10 days,

and B+C= 12 days (as both A+C,

and B+C have to be the factor of 120.

So, A+C does= 120/10= 12 unit/day; so, A=12-7=5 unit/day= Alone in 40 days.

B= 24 days.

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