LikhoPadho

1.  To know the cost of white washing a hall, we have to find the 

2.  Find the side of a cube whose surface area is 2400 cm² 

3. The perimeter of the floor of a hall is 250 m. If the height is 4 m. Find the cost of painting the four walls at the rate of Rs. 8 per square meter.

4.  The length, breadth and height of a rectangular box are 15m, 20m and 8m respectively. Find the cost of painting its outer surface at Rs. 15 per m² 

5.  The dimensions of a metal block are 36 cm by 32 cm by 0.25 m. It is melted and recast into cubes, each of the side 4 cm. How many cubes are formed ? 

6.  What will happen to the volume of a cuboid if its length is doubled, height is same and breadth is halved ?

7.  An ice- cream brick measures 20 cm by 7 cm by 5cm. How many such bricks can be stored in deep fridge whose inner dimensions are 100 cm by 25 cm by 42 cm ?

8. A swimming pool is 20m long 15m wide and 3 m deep. Find the cost of repairing the floor and wall at the rate of Rs. 15 per square meter.

9.  The dimensions of a cinema hall are 50 m, 25 m and 8 m. How many persons can sit in the hall, if each person required 50 m³ of air ?

10. Find the height of a cuboid of volume 100 cm³, whose length and breadth are 5 cm and 4 cm respectively