Question

a pole 65 meters long rests against a wall. (i) if its top end touches the wall at the height of 63 meters , how far is its foot from the wall? (ii)if the foot of the pole is moved 17 meters away from the first position, by how much does the pole slide down

Answer 1

As shown in the fig. let AB be the length of the pole.

sin30

∘

=

15

x

Or

x=15sin30

∘

=

2

15

=7.5m

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Answer 2

Answer:

As shown in the fig. let AB be the length of the pole.

sin30

∘

=

15

x

Or

x=15sin30

∘

=

2

15

=7.5m