Question

7. A straight highway leads to the foot of a tower. A man standing at the top of the
tower observes a car at an angle of depression of 30°, which is approaching the
foot of the tower with a uniform speed. Six seconds later, the angle of depression
of the car is found to be 60°. Find the time taken by the car to reach the foot
of the tower from this point.
f at of a cone is 4 cm and the perimeters (circumferences)​

Answer 1

Step-by-step explanation:

in triangle abc = p /b = tan 60

h / xt = root 3

h = root 3 xt

now

in triangle abd

p / b = tan 30

p / b = 1 / root 3

h / 6x + xt = 1 / root 3

root 3h = x (6 + t )

putting value of h

3xt = x (6 + t)

3t = 6+ t

2t = 6

t = 3 seconds

Answer 2

Answer:

see image for answer

this is correct answer