A and B rent a pasture for 12 months and A puts in 110 cows for 7 months. How many cows can B put in for the remaining 5 months, if he pays half as much as A?
Answer & explanation
Correct answer: option 3
Let the rent for one cow = Rs.1/pm
Then, rent for each partners = no. of cows × time
A : B
No. : 110 : x
Time : 7 : 5
-------------------------
Rent : 770 : 5x
So ATQ,
B paid half the rent paid by A = \(\frac{770}{2}\) = 385
⇒ 5x = 385
⇒ x = 77
Therefore, B puts in 77 cows for the rest 5 months.