An umbrella is made by stitching 10 triangular pieces of cloth of two different colours, each piece measuring 20 cm, 50 cm and 50 cm. How much cloth of each colour is required for the umbrella?

A floral design on a floor is made up of 16 tiles which are triangular, the sides of the triangle being 9 cm, 28 cm and 35 cm. Find the cost of polishing the tiles at the of 50 paise cm ^2 . (see the given figure).

A piece of string is 30 cm long. What will be the length of each side if the string is used to form: (a) a square?

Tina had 20m 5cm long cloth. She cuts 4m 50 cm length of cloth from this for making a curtain. How much cloth is left with her?

A kite in the shape of a square with diagonal 32 cm and an isosceles triangle of base 8 cm and sides 6 cm each is to made of three different shades as showing in fig . How much paper of each shade has been used in it ?

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 cm is to be given for folding it over the top and bottom of the frame. Find how much cloth is required for covering the lampshade.

In the given you see, the frame of a lampshede. 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 cm is to be given for folding it over the top and bottom of the frame. Find how much cloth is required for covering the lampshade.

A person wants to read a book placed at 20 cm whereas the near poit of his eyes is 50 cm. Calculate the power of the lens required.