If the angle of elevation of a balloon from two consecutive kilometre-stones along a road are 30andordm; and 60andordm; respectively, then the height of the balloon above the ground will bea)b)1/2kmc)kmd)Correct answer is option 'A'. Can you explain this answer?

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If the angle of elevation of a balloon from two consecutive kilometre-stones along a road are 30º and 60º respectively, then the height of the balloon above the ground will be

a)
b)
1/2 km
c)
km
d)

Correct answer is option 'A'. Can you explain this answer?

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If the angle of elevation of a balloon from two consecutive kilometre-...

AB = height of balloon
In Δ ABC

In ΔABD
t an 30º

Now, PD : AB : PB
1 :

1 :

: 3
CD = BD – BC
= 3 – 1 = 2 units
2 units = 1 km
1 unit = 1/2

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If the angle of elevation of a balloon from two consecutive kilometre-stones along a road are 30º and 60º respectively, then the height of the balloon above the ground will bea)b)1/2kmc)kmd)Correct answer is option 'A'. Can you explain this answer?

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