A blimp is hovering 120 metres directly above the finish line of a 200 metre sprint. The angle of depression to the first runner on the home straight is 50° initially, and 8 seconds later, it is 85°. Calculate the distance travelled (to the nearest metre) by the runner in the 8 seconds and his average speed in km/h for that part of the race.

Question

anonymous · Answer

http://www.twiddla.com/895293 come here

anonymous · Answer

first find the value of x

anonymous · Answer

did u got it???

campbell_st · Answer

draw a picture

|dw:1343295767947:dw|

find the length of b and then a

the distance travelled in 8 seconds is b - a

tan 50 = 120/b                   tan85 = 120/a


b = 120/tan 50                          a = 120/tan85

this should be a good start to the question