A and B rent a pasture for 12 months and A puts in 70 cows for 9 months. How many cows can B put in for the remaining 3 months, if he pays half as much as A?
Answer & explanation
Correct answer: option 4
Let the rent for one cow = Rs.1/pm
Then, rent for each partners = no. of cows × time
A : B
No. : 70 : x
Time : 9 : 3
-------------------------
Rent : 630 : 3x
So ATQ,
B paid half the rent paid by A = \(\frac{630}{2}\) = 315
⇒ 3x = 315
⇒ x = 105
Therefore, B puts in 105 cows for the rest 3 months.