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. (i) What is the area of the glass? (ii) How much of tape is needed for all the 12 edges?

A small indoor green house (herbarium) is made entirely of glass panes (including base) held together with tape. The dimensions of the green house are 40cm xx 30cm xx 25cm . Find: the area of the glass used

A small indoor green house (herbarium) is made entirely of glass panes (including base) held together with tape. The dimensions of the green house are 40cm xx 30cm xx 25cm . Find: the length of the tape required

A cubical box has each edge 10 cm and another cuboidal box is 12.5 cm long, 10 cm wide and 8 cm high.(i) Which box has the greater lateral surface area and by how much? (ii) Which box has the smaller total surface area and by how much?

How many square metres of glass will be required for a window, which has 12 panes, each pane measuring 25 cm by 16 cm?

A cardsheet divided into squares each of size 1 mm^(2) is being viewed at a distance of 9 cm through a magnifying glass (a conerging lens of focal length 10 cm ) held close to the eye. (a) What is the magnification produced by the lenas ? How much is the area of each square to the virtual image ? (b) What is the angular magnification (magnifying power) of the lens ? ( c) Is the magnification in (a) equal to the magnifying power in (b) ? Explain

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. Find how much he would spend for the tiles, if the cost of the tiles is Rs 360 per dozen.

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 Rs 360 per dozen.

In Fig. 13.12, you see the frame of a lampshade. It is to be covered with a decorative cloth. The frame has a base diameter of 20 cm and height of 30 cm. A margin of 2.5 cmis to be given for folding it over the top and bottom of the frame. Find how much cloth is required for covering the lampshade

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