12. Four mark example problems

1. If the length and breadth of a rectangular painting are \(4xy^3\) and \(3x^2y\). Find its area.

 

 

Answer:

 

Area \(=\)

 

2. Ram deposited '\(x\)' number of \(₹2000\) notes, '\(y\)' number of \(₹500\) notes, '\(z\)' number of \(₹100\) notes in a bank and Velan deposited '\(3xy\)' times of amount of what Ram had deposited. How much amount did Velan deposit in the bank?

 

 

Answer:

 

Amount deposited by Velan \(= ₹\)