1.

A child prepares a poster on 'Save Energy'on a square sheetwhose each side measures 60 cm. At each cornerof the sheet. She draws a quadrant of radius17.5cm in whichshe shows the ways to save energy. At the centre, she draws a circle of diameter 21 cm and writes a slogan in it . Find the area of the remaining sheet .(a)write down the four waysby whichenergy can be saved.(b)Write a slogan on 'Save Energy' . (c)Why do we need to save energy ?

Answer»


Answer :`2291 cm^(2)`
a (i)SAVING electricity by using CFLs, switchingoff APPLIANCES whennot in use.
(ii)Saving WATER by using it efficiently.
(iii)Saving petroleum resources by using public TRANSPORT.
(iv)Using solar energy.
(b) 'Save Energy, Save Environment'or any othergivne by students .
(c)We should save energy to save our environment so that we can give a battertomorrowto the forthcominggenerations.


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