2. A can do a piece of work in 30 days and B can do it in 20 days. They work together for 4 days and then B leaves the job. In how many days, will A finish the remaining work?
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HERE'S THE ANSWER...
____________________________
▶️ Making equations first..
♠️ A can do a piece of work in 20 days
⏺️ __( 1 )
♠️ B do that work in 15 days
⏺️ __( 2 )
♠️ Now A and B together do a work
⏺️ Adding eqn ( 1 ) and ( 2 )
=>
⏺️ L.C.M. = 60
=>
=>
♠️ They worked together from 6 days
=>
=>
♠️ If A left and remain work had to be done by B
=> Remaining work = 1 - 7 / 10
=>
♠️The B will take to complete the remaining work
= 10/3 × 1/15
=> 10/45
♠️ So B will complete it in
=> 45/10
=> [ 4.5 days ]✔️✔️✔️
=> 2
HOPE HELPED...
Step-by-step explanation:
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