Interested to Buy Any Domain ? << Click Here >> for more details...
Radius of sphere is increased by 50%. By how much percentage
is surface area is increased?
- 13 Answers
- 48941 Views
- GD Goenka, Mascot, I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / aditi joshi
let original radius=100
original surface area lets say it x =4 * (22/7) * 100 *100
new radius=100 + 50% of 100=150
new surface area lets say it y = 4 * (22/7)* 150* 150
increase in surface area=((y-x)/x) * 100
i.e.
((4*(22/7)*150*150 - 4*(22/7)*100 *100) / (4*(22/7)*100*100))*100
=125
so the answer is 125%.
hope this helps you.
| Is This Answer Correct ? | 64 Yes | 17 No |
Answer / saurabh
surface area will increase by 125%
and shruti u r wrong
| Is This Answer Correct ? | 52 Yes | 17 No |
Answer / arvind yeram
r1 = initial radius
r2 = final radius
s1 = 4πr1^2
s2 = 4πr2^2
r2 = 50/100r1+r1 = 3/2r1
s2 = 4π9/4r1^2
%increase = (9/4-1)*100
= 5/4*100
= 125
| Is This Answer Correct ? | 32 Yes | 16 No |
Answer / harsh goel
let the edge of cube be=x
the edge increased by 50%
=x+50÷100
=x(1+1/2)
=3x/2
orignal surface area=6x^2
new surface area of a cube=6(3x/2)^2
=6×9x^2/4
=27x^2/2
increased in area of cube=27x^2-12x^2/2
=15x^2/2
the percentage increased=increase in area/orignal area ×100
=15×100/2×6x^2
=1500/12x^2
=125%
| Is This Answer Correct ? | 13 Yes | 5 No |
Answer / satyam
1st sphere=x and 2nd sphere=y then
x=4(22/7)×100 50=4(22/7)150
y=4(22/7)×100=4(22/7)100
area={(x-y/x))r2
={4(22/7)150-4(22/7)100/4(22/7)100}r2
={4(22/7)50/4(22/7)100}r2
={50/100}r2
=.5×r2 ;0.5×0.5=0.25 = 100 25= 125%
| Is This Answer Correct ? | 10 Yes | 3 No |
Answer / brebis
surface area increases with radius by factor 4.
i.e. 200%
| Is This Answer Correct ? | 3 Yes | 13 No |
Answer / debanjana
radius is only half of the diameter, so the diameter should
be counted which is the surface area, so it should be 100%
| Is This Answer Correct ? | 3 Yes | 14 No |
In base 10 representation for a rupee 100 paise,then base 8 representation what is rupee value?
A ship started from port and moving with I mph and another ship started from L and moving with H mph. At which place these two ships meet ?
if the word 'ddosszm' is changed to 'central' then what will be the change for 'rtjbl' ?
Four of the following five are alike in a certain way and so form a group. Which is the one that does not belong to that group? (a) Fruit (b) Leaf (c) Flower (d) Tree (e) Trunk
Perimeter of front wheel =30, back wheel = 20. If front wheel revolves 240 times. Howm many revolutions will the back wheel take?
A boy asked a girl her name she replied your name is behind your scooty Behind the scooty is written 7.3 3.3 9.3 2.3 What is her name? ?
Given a collection of points P in the plane, a 1-set is a point in P that can be separated from the rest by a line; i.e. the point lies on one side of the line while the others lie on the other side. The number of 1-sets of P is denoted by n1(P). The maximum value of n1(P) over all configurations P of 19 points in the plane is 18 9 3
40.83 x 1.02 x 1.2 = ? (a) 49.97592 (b) 41.64660 (c) 58.7952 (d) 42.479532 (e) None of these
2, 5,11,23,47,?
Under CICS, multitasking achieved by what method? A. virtual paging. B. task switching. C. priority numbering, D. pseudo conversational
Rearrange MERGANY
If on an item a shop gives 25% discount, they earn 25% profit. If they now give 10% discount then what is the profit percentage
English 
