Question

2. A ladder 10 metres long reaches to a distance of 10 metres from the top of flat-saft. At the
foot of the ladder, the elevation of the top of flag-staff is 60. Find the height of flag-staf​

Answer 1

Answer:

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Answer 2

Step-by-step explanation:

CD=AD=9m

∵△ACD is isosceles.

∠CAB=60°

∴∠ACB=∠CAD=30°

∴∠BAD=30°

In △ABD,

sin30°= AD/BD.

⇒BD=ADsin30°=4.5

Therefore,

BC=BC+DC=4.5+9=13.5m