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Hows it
Sir I think option 4 is not ryt..it should be 4 times.
4 guna hoga bcaz .....r=€l/a,a=Pir^2,(r/2)^2=r^2/4=4€l/a
4 guna hoga d mai chenge kyu karna r sy banaiye 4 guna niklega
Sir I think option 4 is not ryt..it should be 4 times.
R=p.l/A A=πr^2
Or D=2r or r=D/2 पहले के लिए
बाद में 2r =D/2 or r=D/4
Now
R=p. l/πr^2
R=p.l/(D/4)^2
R=16.R अथार्थ पहले का 16 गुना
A OPTNS.
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