A takes twice as much time as B or thrice as much time as C to finish a piece of work . Working together , they can finish the work in 2 days . B can do the work alone in :
6 days
8 days
12 days
4 days
Description (বিবরণ) :
প্রশ্ন: A takes twice as much time as B or thrice as much time as C to finish a piece of work . Working together , they can finish the work in 2 days . B can do the work alone in :
ব্যাখ্যা:
Let's assume,
A can do the work in x days
B can do the work in x/2 days
C can do the work in x/3 days
Together they in 1 day do = ( 1/x + 2/x + 3/x) portion
Now, 1/x + 2/x + 3/x = 1/2
1 + 2 + 3/x = 1/2
x = 12
B can do the work in = 12/2 = 6 days
