Heights and Distances Practice Test 1

Question : 39 of 40

Marks: +1, -0

A round balloon of unit radius subtends anangle of 90°at the eye of an observer standingat a point, say A. What is the distance of thecentre of the balloon from the point A?

$1/ 2$
$√ 2$
2
$1/2$
None of these

Validate

Solution:

In DOAB,

\sin 45°={OB}/{OA}

⇒1/√2=1/{OA}⇒OA=√2

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