an aeroplane is flying horizontally at a height of 1500 root 3 above the ground is observed at a certain point on earth to send an angle of 60 degree after 15 second its angle of elevation at the same point is observed to be 30 degree calculate the speed of the aeroplane in kilometre per hour
Answers
Answered by
6
after that calculate speed
Attachments:
Answered by
1
Step-by-step explanation:
In ΔABE,
tan 60°=BE/AE
√3=1500√3/AE
ttAE=1500m
In ΔACD,
tan30°=CD/AD
1/√3=1500√3/AD
AD=4500
ED=AD-AE = 4500-1500 = 3000
ED=BC=3000
speed=distance/time
= 3000/15= 200m/s
Attachments:
Similar questions