19. Bir mumun \( \frac{2}{9} \) 'si yanunca orta noktası 2 cm kay. digina göre mumun yanmadan önceki boyunun uzunlugu kaç cm'dir? \( \begin{array}{llll}\text { A) } 15 & \text { B) } 18 & \text { C) } 21 & \text { D) } 27\end{array} \)

Case Study Based Question There was a deserted land near Ryan's house. The colony people used to throw garbage on that land. Ryan, along with his friends, decided to develop the land into a park with walking track with uniform width, where children can play and elders can work. On the basis of above information answer the following questions: (a) What is the width of the track? (b) Find the breadth of inner rectangle. (c) Find the area of walking track. (d) Find the cost of leveling the park including the track at the rate 210 per square m . (e) Which values Ryan has shown here?

3) Flool of an ICT room of school is to be fitted with a square marble of the largest possible size. The size of the room is lam by 7 cm . What sho- wld be the size of the tiles required that has to be cut \& how many such tiles are required?

9. Five square flower beds each of sides 1 m are dug on a piece of land 5 m long and 4 m wide. What is the area of the remaining part of the land? X. By splitting the following figures into rectangles, find their areas

Find the volume of the pyramid with base in the plane \( z=-5 \) and sides formed by the three planes \( y=0 \), and \( y-x=1 \) and \( x+y+z=0 \). NotE: Enter the eroct answer.

5.20. In un rettangolo un lato misura 1 unità più dell'altro. Detta \( x \) la misura del lato minore, esprimi, in funzione di sharea di un quadrato che ha lo stesso perimetro del rettangolo.