Arjun is making prawn biryani for lunch, he went to the market to buy prawns but he has only $₹250$ with him, how much does he have to borrow from the shopkeeper if he wants to buy $3kgs$ of prawns at $₹150$ per kg?

The correct option is (D),
Given the cost of $1kg$ of prawns $=₹150$
Arjun wants to buy $3kgs$ of prawns so has to spend
$$\begin{gathered} =150\times 3 \\ =₹450 \end{gathered}$$
Arjun has only $₹250$ with him
He needs to borrow
$$\begin{gathered} =450-250 \\ =200 \end{gathered}$$
Therefore, for Arjun to buy $3kgs$ of prawns he needs to borrow $₹200$ from the shopkeeper.