or
or
Let, A can finish the job in x days
B can finish the job in 3x days.
According to the question
3x - x = 60
2x = 60
x = 30 days
B can finish the job in 3 × 30 or, 90 days
In 1 day A can finish 1/30 th job
In 1 day B can finish 1/90 th job
In 1 day both A and B can finish 1/30 + 1/90 th job
= 3 + 1 /90 = 2/45 th
both A and B can finish the job in 1/2/45 = 22.5 days.
আপনি আমাকে যেকোনো প্রশ্ন করতে পারেন, যেমনঃ
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