A small indoor greenhouse (herbarium is made entirely of glass panes (including base) held together with tape. It is 30 cm long, 25 cm wide and 25 cm high. How much of tape is needed for all the 12 edges ?

A small indoor greenhouse (herbarium is made entirely of glass panes (including base) held together with tape. It is 30 cm long, 25 cm wide and 25 cm high. What is the surface area of the glass ?

How many planks of dimensions (5mxx25cmxx10cm) can be stored in a pit which is 20 m long, 6m wide and 80 cm deep?

Hameed has built a cubical water tank with lid for his house, with each outer edge 1.5 m long. He gets the outer surface of the tank excluding the base, covered with square tiles of side 25 cm (see Fig. 13.5). Find how much he would spend for the tiles, if the cost of the tiles is ₹ 360 per dozen.

How many bricks will be required to construct a wall 8 m long, 6 m hight and 22.5 cm thick if each brick measures 25 cm long,11.25 cm high and 6 cm?

A cylinder of mass 10 kg and radius 15 cm is rolling perfectly on a plane of inclination 30^@ . The co-efficient of static friction mus = 0.25 :- How much is the force of friction acting on the cylinder ?

Water in a canal 6 m wide and 1.5 m deep is flowing with a speed of 10 km/h. How much area will it irrigate in 30 minutes, if 8 cm of standing water is needed ?

A cubical box has each edge 10 cm and a cuboidal box is 10 cm wide, 12. 5 cm long 8 cm high. Which box has the smaller total surface area and by how much ?

A cubical box has each edge 10 cm a cuboidal box is 10 cm wide, 12. 5 cm long 8 cm high. Which box has the greater lateral surface area and hy how much ?

At a Ramzan Mela, a stall keeper in one of the food stalls has a large cylindrical vessel of base radius 15 cm filled up to a height of 32 cm with orange juice. The juice is filled in small cylindrical glasses of radius 3 cm up to a height of 8 cm, and sold for ₹ 3 each. How much money does the stall keeper receive by selling the juice completely?