Question

Hey guys ❤️

A and B can do a bit of work in 12 days. B and C can do it in 15 days while C and A can do it in 20 days. In how long will they complete it cooperating? Additionally, in how long can A alone do it?​

Answer 1

Solution

Given :-

• Working day of (A + B) = 12
• Working days of (B + C) = 15
• Working days of ( C + A) = 20

Find :-

• working days of A

Explanation

According to question,

• (A + B )'s 1 days work = 1/12
• (B + C)'s 1 days work = 1/15
• (C + A)'s 1 days work = 1/20

then ,

Including 1 days work be

==> 2(A + B + C) = ( 1/12 + 1/15 + 1/20)

==> 2(A + B + C) = ( 5 + 4 +3)/60

==> 2(A + B + C) = 12/60

==> 2(A + B + C) = 1/5

==> ( A + B + C) = 1/10 .

Since

• If they working together then, they can complete work in 10 days.

_________________________

Now, Calculate working days of A if he work alone

==> A's 1 days work = 1/10 - 1/15

==> A's 1 days work = ( 6 - 4)/60

==> A's 1 days work = 2/60

==> A's 1 days work = 1/30

Hence

• A can complete work in 30 days if they work alone .

________________________

Answer 2

Answer:

hope it's helpful

Step-by-step explanation:

refer to above picture for answer