Can you solve this under a minute?

Geometry Level 1

Two poles of heights 6m and 12 m stand vertically on a horizontal plane.If the distance between their feet is 10m , then the distance between their top is -

4 34 4\sqrt { 34 } 4 17 4\sqrt { 17 } 2 17 2\sqrt { 17 } 2 34 2\sqrt { 34 }

This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try refreshing the page, (b) enabling javascript if it is disabled on your browser and, finally, (c) loading the non-javascript version of this page . We're sorry about the hassle.

2 solutions

Mardokay Mosazghi
Jul 28, 2014

@ankit i think your solution to this problem is incorrect, since i saw this problem reported i answered the obvious incorrect solution. The answer to this problem should be a 2 + b 2 = c 2 a^2+b^2=c^2 , and plugging a = 10 a=10 , b = 12 6 = 6 b=12-6=6 , so the answer simplifies to 136 = 2 34 \sqrt {136}=2\sqrt{34}

The anwer must be 2 root 34 I did it on 29 july and still it was wrong!!

Parth Lohomi - 6 years, 10 months ago

Thanks! The answer has been updated to 2 34 2 \sqrt{34} .

Calvin Lin Staff - 6 years, 10 months ago

Log in to reply

Yeah i guess you cannot change the future that deducts you points if you get it right while the answer is wrong. @Calvin Lin p.s points don't matter.

Mardokay Mosazghi - 6 years, 10 months ago

Log in to reply

Topic ratings and points do get adjusted accordingly. You will receive an email when we change the answer and subsequently mark your attempt correct or wrong.

Sometimes, we do not mark previous answers as wrong, especially if the problem has been substantially changed / the meaning was greatly different.

Calvin Lin Staff - 6 years, 10 months ago

Oh yes i see....You're absolutely correct I'll edit it right now

Ankit Vijay - 6 years, 10 months ago

you are right @mardokay

Arshad R Shaikh - 6 years, 10 months ago

The correct answer is (2√34 + 12) approx 4√34. It's because 2 poles placed vertically makes two triangles. One by straight line from pole A top to pole B bottom another from pole B top to pole A top.

Naren Pv - 6 years, 10 months ago

Log in to reply

@Naren Pv Sir you are wrong then aswer is 2 34 2\sqrt{34} , refer to my solution above.

Mardokay Mosazghi - 6 years, 10 months ago

how did you get the +12

Mardokay Mosazghi - 6 years, 10 months ago

By pythagorean theorem,

h 2 = 6 2 + 1 0 2 = 36 + 100 = 136 h^2=6^2+10^2=36+100=136 \implies h = 136 = 2 34 h=\sqrt{136}=\boxed{2\sqrt{34}}

0 pending reports

×

Problem Loading...

Note Loading...

Set Loading...