Capgemini
Company
Numerical Ability
Geometry
If the radius of the circle is increased by 20% then area is increased by:
a.44% b.120% c.144% d.40% e.none of these
Read Solution (Total 5)
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- a 44%
let the radus be 100 ,then area =10000pi
radius increased by 20% then r = 120, area = 14400pi
change in area =4400
percentage = 4400/10000 =44% - 12 years agoHelpfull: Yes(35) No(1)
- let r=10 a=100
r=12 a=144
144-100=44
44% - 12 years agoHelpfull: Yes(11) No(0)
- Area of circle=pi*r^2
Let the initial radius=100
if area is increased by 20% then new radius=120
hence difference in area=120^2-100^2=44 - 12 years agoHelpfull: Yes(8) No(1)
- increase in area = (x^2/100)+2x%
where, x is the increase amount and that is 20
so, 20*20/100 +2*20=44% - 8 years agoHelpfull: Yes(1) No(0)
- relative percentage formula = p + p + ( ( p * p ) / 100 )
so 20 + 20 + ( ( 20 * 20 ) / 100 ) = 44% - 7 years agoHelpfull: Yes(0) No(0)
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