Question

A moving boat is observed from the top of a 150m high cliff moving away from the cliff. The angle of depression of the boat changes from 60° to 45° in 2 minutes.fnd speed
Immidate answer plss

Answer 1

• Step-by-step explanation:

tan60=150/y

y=150/3^1/2

tan45=150/x+y

x+y=150

x=150-y = 150(3^1/2-1)/3^1/2

x is the distance travelled by the boat

therefore,

speed=D/T=x/T

=x/120 m/s

now put the value of x find the ans.