Question

the roof of a building is 8 metre high. A rope is tied from the roof to a peg on the ground 6m away from the wall. what is the minimum length of the rope?

Answer 1

Answer->
Length of rope is 10 m

Answer 2

as height of building will be perpendicular and distance from wall to rope will be base and required length of rope will be hypotenuse.so by pthagorus theorem of hypotenuse = √(perpendicular square +base square ).

hypotenuse or length of rope = √(8m × 8m + 6m × 6m )
√( 64 square m + 36 square m )
= √( 100 square metres )
= 10 m.

I hope it will help you..