To tile the floor of a room of dimensions $8 \mathrm{m} \times 4·8 \mathrm{m},$ rhombus-shaped tiles of diagonals $16 \mathrm{cm}$ and $12 \mathrm{cm}$ costing $₹24$ and square-shaped tiles of diagonal $16 \mathrm{cm}$ costing $₹28$ are available. Which type of tiles should be chosen to minimize the cost? How much can be saved by choosing the right type over the other?

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

The three sides of a triangle are $15 cm, 36 cm, and 39 cm$ long. A small triangle is formed by joining the mid points of the three sides of this triangle. The area of small triangle will be_____ $c{m}^2$  

The length of rectangle is $80\%$ of diagonal of square of area $1225 {\mathrm{m}}^2$, then find area of rectangle, if it's perimeter is $94\sqrt{2} \mathrm{m}$.

In $△ABC, AD$ is the median and $G$ is a point on $AD$ such that $AG:GD=2:1$. Then area $(△BDG):$area $(△ABC)$ is equal to: