What is the $40 \%$ of $50 \%$ of $\frac{3}{4}$ of $3200$?

An ore contains $23 \%$ copper. To get $69 \text{ kg}$ of copper, the quantity of the ore required is: (in $\text{ kg}$)

At an election,a candidate got elected by fetching $63 \%$ of the total votes. If $54982$ voters did not vote in favour of the elected candidate,what was the total number of votes polled?

$45 \%$ of $1500 + 35 \%$ of $1700 = ? \%$ of $3175$

If the length and breadth of a rectangular field are increased,the area increases by $50 \%$. If the length is increased by $20 \%$,by what percentage was the breadth increased?

For a rectangle,the length and breadth are increased by $10 \%$ and $20 \%$,respectively. The percentage increase in area is: