+0  
 
0
60
1
avatar

A kite is 30m from the ground. A cyclist observes it flying when he looks up at an angle of 20°. After 15 seconds, the cyclist has to look up at an angle of 60° to see the kite. Calculate the speed of the cyclist. Give your answer in km/h.

 

I'm very stuck!

 Aug 25, 2020
 #1
avatar
0

Find horizontal distance when 20 degrees

tan 20 = 30/d1

 

then find horizontal distance 15 seconds later

 

tan 60 = 30/d2

 

d1-d2 = km distance in 15 seconds....convert to Hours....to calculate  km/hr

 Aug 25, 2020

10 Online Users