Question

In ancient times, the Lepcha’s of Sikkim were said to use yarn spun out of stinging nettle (sisnu) plant to weave clothes. Today cotton and woollen yarn are used together with vegetable dyes and synthetic colours. Lepcha weaves or ‘thara’ is woven in vertical looms with a backstrap. Such looms are of small width. Traditional design with different colours are used to make tharas which are used for making bedspreads, bags, belts, curtains, cushion covers, table mats, tray cloths etc, apart from their traditional dress. In the given figure you can see the frame of a lampshade. It is to be covered with a decorative cloth. The frame has base diameter of 80 cm and diameter of the top 50 cm, slant height is 63 cm. Find how much cloth is required for covering 40 such lampshades

Answer 1

Answer:

22000

STEP BY STEP EXPLANATION:

Here r =(20/2) cm =10cm and h=30 cm +2×2.5

cm =35cm

Cloth required for covering the lampshade.

=It's curved surface area

=2πrh

=(2×22/7×10×35)cm square

=2200cm square.