Can anyone help solving the following 2 questions?
https://img366.imageshack.us/my.php?imag ... 249zn6.jpg
https://img508.imageshack.us/my.php?imag ... 578ls0.jpg
Help, anyone?
5-Day Free Trial
5-day free, full-access trial TTP
Available with Beat the GMAT members only code
MORE DETAILS
Geometry from GMATPrep-1
This topic has expert replies
-
sgarnepudi
- Junior | Next Rank: 30 Posts
- Posts: 20
- Joined: Sat Sep 13, 2008 11:30 am
If could try the second one .. pls confirm if its correct or not ..
as its an eqilateral triangle all the arcs will be same so there will be 4 arcs total.. if 3arcs = 24 perimeter is 32 = 2*Phi*r so r is approx 5.9 * 2 = 11 apprx is the diameter.
as its an eqilateral triangle all the arcs will be same so there will be 4 arcs total.. if 3arcs = 24 perimeter is 32 = 2*Phi*r so r is approx 5.9 * 2 = 11 apprx is the diameter.
-
rabab
- Master | Next Rank: 500 Posts
- Posts: 132
- Joined: Fri Sep 05, 2008 10:19 pm
- Location: Bangladesh
- Thanked: 1 times
sgarnepudi wrote:If could try the second one .. pls confirm if its correct or not ..
as its an eqilateral triangle all the arcs will be same so there will be 4 arcs total.. if 3arcs = 24 perimeter is 32 = 2*Phi*r so r is approx 5.9 * 2 = 11 apprx is the diameter.
Oh yes, the answer is 11. Thank you.
Can anyone help with the Q no 1 pls?
lines are perpendicular so product of slopes = -1rabab wrote:sgarnepudi wrote:If could try the second one .. pls confirm if its correct or not ..
as its an eqilateral triangle all the arcs will be same so there will be 4 arcs total.. if 3arcs = 24 perimeter is 32 = 2*Phi*r so r is approx 5.9 * 2 = 11 apprx is the diameter.
Oh yes, the answer is 11. Thank you.
Can anyone help with the Q no 1 pls?
-1/sqrt(3) * t/s = -1
t = sqrt(3) * s
from OP
radius = 2
hence
s^2 + t^2 = 4
s^2 + 3s^2 = 4
s= + - 1
take +ve
Hope this helps...
-
earth@work
- Master | Next Rank: 500 Posts
- Posts: 248
- Joined: Mon Aug 11, 2008 9:51 am
- Thanked: 13 times
question 1:
let PQ intersect y-axis at D , pyth. theorem on triangle POD gives radius=2
now cos POX' = (sq root 3)/2=cos 30
we get angle QOX=60 Degree
cos 60 = s/2=1/2
therefore, s=1
let PQ intersect y-axis at D , pyth. theorem on triangle POD gives radius=2
now cos POX' = (sq root 3)/2=cos 30
we get angle QOX=60 Degree
cos 60 = s/2=1/2
therefore, s=1
