Prisoners trying to escape.

To try and find the height of the wall so that they can determine how many bed sheets they can tie



togethr to make their rope , the full height of the wall at the crossing point P.







Each sheet contributes 2.1m to the length of the rope.







From point A in the prison yard,due south of P,a prisoner measures the angle of elevation of P



to be 31 degrees



 

From poit B in the prison yard 15 meters due east of A,he finds the angle of elevation of P is



25 degrees



 

The eye of the prisoner is 1.7m  above the ground.







Calculate the vertical height of the wall to the nearest 0.1m,and hence determine the number of



sheets needed for the rope.

The diagram looks something like this.Please feel free to ask any doubt.

For calculation purpose im even giving the answers.

Answer is 7.2 m and 4 .sheets.

To the nearest decimal point.

Nice question...tryin..

Please don't post the answer too soon!!

Thanks!:-)

Btw where is it from?

Sorry "learner" that i gave mentioned the answer, thought that it would help by going in reverse.

The question is from my text book.Its supposed to be a hard one, like the last sums of a exersise.

Sorry, I meant dont give the solution too soon...

giving the answer IS pretty helpful!!

its quite easy if you use tables....

Am trying to find another way..