Ben has $₹400$. He spent one fourth of the money to buy prawns. How many kilograms did he buy if one kilogram of prawns cost $₹100$?

The correct option is A $1\text{kg}$
Ben had $₹400$​
Amount spent to buy prawns $=$ One fourth of $₹400=₹100$
Cost for $1\text{kg}$ prawns $=₹100$
Kilograms bought by Ben $=\frac{100}{100}\text{kg}$ ​
$=1\text{kg}$