Question

Vijay lives in a flat in a multi storey building is driving was so his father keeps on his grave was he drives from his house to Faridabad his father was standing on the top of the building at point p as shown in the figure at the point see the angle of depression of the car from the building was 60 degree after accident accident in 20 from. c Vijay stops at the point to buy ice cream and the angle of depression changes to 30 degree by analysing the above given situation answer the following questions find the value of x find the height of the building ab​

Answer 1

Answer:

height of building AB= 17.32 m

Step-by-step explanation:

Given:

BC= 20 m

∠EDC= 30°

∠BDE= 30°

So,  

∠ADC= 60°

∠ADB=30°

Let distance AB= x and AD= y

then tan 30°= y/x

⇒y= x/√3

Also, (y+20)/x= tan 60°

⇒y =√3x-20

solving the above two equation we get

x= 10√3 m =17.32 m

y= 10 m

Answer 2

Answer:

(i)17.3m

(ii)10m

(iii)