8th Class
Mathematics
Related to Competitive Exam
Question Bank
Arithmetic
question_answer
If the rent for grazing 40 cows for 20 days is Rs.370, how many cows can graze for Rs.111 for 30 days?
A)60
B)8
C)25
D)30
Correct Answer:
B
Solution :
Rent
No. of
No. of
(in Rs.)
days
cows
370
20
40
111
30
x
Rent is in inverse variation with number of days but rent is indirect variation with number of cows \[{{a}_{1}}:{{a}_{2}}::{{b}_{2}}:{{b}_{1}}\] \[8\times 32=256,16\times 16=256,32\times 8=256\]