Question

If $20$ cows cost $Rs.90$ the cost of $9$ cows is

• A. $Rs.405.00$
• B. $Rs.4.50$
• C. $Rs.40.50$
• D. $Rs.45.00$

Answer 1

Answer: (C)

$Rs.40.50$

Using unitary method

20 cows cost Rs.90

Therefore 9 cows cost $90\ast \frac{9}{20}=40.5$