Question

.When a building under construction was observed from a point P, 120m from its

base, the angle of elevation of the top was 30◦. After its completion when it was

again observed from the same point, the angle changed to 60◦. How much higher

was the building raised, from the time it was first observed.​

Answer 1

Answer:

60 m

Step-by-step explanation:

At 30°, d = 120 m

So,

At 60°, d' = d/2 = 60 m