A triangle has side lengths $\mathrm{x} \mathrm{cm}, \mathrm{x}+13 \mathrm{cm}$ and $\mathrm{x}+26 \mathrm{cm}$. If its area is $126$ square $\mathrm{cm}$, then what is the value of $\mathrm{x}$?

The perimeter and the breadth of a rectangle are $52 cm$ and $12 cm$ respectively. Find its area in $c{m}^2$.

If the area of a circle is $9\pi$ sq.cm, then its circumference is:

1. $9$ cm
2. $6\pi$ cm
3. $3\pi$ cm
4. $6$ cm

By melting a solid cylinder of radius 3 cm and height 20 cm, five spherical balls each of same size are formed. Find the radius of each ball. 

(A) 2 cm

(B) 3 cm 

(C) 4 cm 

(D) 5 cm 

What is the area of this trapezoidal garden (All measurements are in cm)? 

1. $60$ sq.cm
2. $180$ sq.cm
3. $210$ sq.cm 
4. $240$ sq.cm