Question : The length, breadth, and height of a hall are 10 m, 20 m, and 15 m, respectively. Find the cost of whitewashing the walls of the inside of the hall and ceiling, at the rate of INR 10.20 per m².

Option 1: INR 13,394

Option 2: INR 11,220

Option 3: INR 15,320

Option 4: INR 16,542

Question : The length, breadth, and height of a room are 10 m, 8 m, and 6 m, respectively. Find the cost of whitewashing the walls of the room and the ceiling at the rate of 7.50 per m².

Option 1: Rs. 2220

Option 2: Rs. 1850

Option 3: Rs. 2150

Option 4: Rs. 2000

Question : If the volume of one brick is 0.0014 m³, how many bricks will be required to construct a wall of length 14 m, breadth 0.125 m, and height 5 m?

Option 1: 5250

Option 2: 3250

Option 3: 6250

Option 4: 4250

Question : The perimeter of an equilateral triangle is equal to the circumference of a circle. The ratio of their areas is: ( Use $\pi =\frac{22}{7}$)

Option 1: $22 : 21\sqrt{3}$

Option 2: $21: 22\sqrt{3}$

Option 3: $21: 22\sqrt{2}$

Option 4: $22: 21\sqrt{2}$

Question : In the given figure, $PQRS$ is a rectangle and a semicircle with $SR$ as the diameter is drawn. A circle is drawn as shown in the figure. If $QR=7\;\mathrm{cm}$, then what is the radius (in $\mathrm{cm}$) of the small circle?

Option 1: $21+14\sqrt{2}$

Option 2: $21-14\sqrt{2}$

Option 3: both $21+14\sqrt{2}$ and $21-14\sqrt{2}$

Option 4: None of these