Question

Help me do it please I will give 60 ball
Помогите решить пожалуйста я дам 60 баллов

Answer 1

Ответ:

Объяснение:

1. Note the point of the person's eye is A and the points from the top of building are B,C and D.

So ΔACD and ΔABC are rectangular.

So CD=2 m => AC= CD/tg 27° = 2/tg27°≈3.93

CB=AC*tg64° ≈8.06 m

=> Height of the building=BD=2+8.06=10.06 m

2. Note the triangle water edge -bridge ABC and water edge -yacht ADF

AB=59 m ,∡CAB=3° , AD=14 m ,∡FAD=10°

To solve the problem we have to compare BC and DE.

In case BC>DE the yacht passes under the bridge.

BC= AC*tg3° =59*tg3°≈3.09

DE=AD*tg10°=14*tg10°≈2.47

So the yacht can pass under the bridge in case waves are not too big.