Find the area of a triangle in which base is $1.5\, m$ and height is $75\, cm$? (in $sq. cm.$)

The ratio of the area of a sector of a circle to the area of the circle is $1:4$. If the area of the circle is $154 \, cm^2$,the perimeter of the sector is ........ $cm$.

The area of a rectangle is $460 \, m^2$. If the length is $15 \%$ more than the breadth,what is the breadth of the rectangular field? (in $metres$)

The length of a rectangle is increased by $60 \%$. By what percent would the width have to be decreased so as to maintain the same area?

If the perimeter of a semi-circular protractor is $36 \, cm$,then its diameter is ...... $cm$?

If the area of a square increases by $69 \%$,then the side of the square increases by (in $\%$)