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Mona Monu

· started a discussion

· 1 Months ago

doubt(Q-79) (Question: 86845.0 )

From where did 2x come?

i mean (15-2x)/2 ?? plz explain

Question:
A alone can reap a certain field in 15 days and B in 12 days. If A begins alone and after a certain interval B joins him the field is reaped in 7\(\cfrac{1}{2}\) days. How long did A and B work together?
Options:
A) 3 days
B) 6 days
C) 7 days
D) 12 days
Solution:

Ans: (b) 


Knowledge Expert

· commented

· 1 Months ago

(15/2-x)=>(15-2x)/2

anuraj chauhan

· commented

· 1 Months ago

(15/2-x)=>(15-2x)/2
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