Question
A man observes the top of a lighthouse from a point on
the ground 30 m away from its base. If the angle of elevation is 60°, what is the height of the lighthouse?Solution
Formula Used: Height of the lighthouse = Distance from the base × tan(angle of elevation) Calculation: tan(60°) = √3 ≈ 1.732 ⇒ Height of the lighthouse = 30 × 1.732 ⇒ Height of the lighthouse ≈ 51.96 m The height of the lighthouse is approximately 51.96 m.
What will come in place of the question mark (?) in the following series?
1528, 1416, 1204, ?, 480, -32
143 Â Â Â Â 119Â Â Â Â 107Â Â Â Â 101Â Â Â Â Â 98Â Â Â Â ?
96 89 ? 90 94 91
...What value should come in the place of (?) in the following number series?
19, 235, 260, 324, 333, ?
What will come in place of the question mark (?) in the following series?
305...
In each of the following number series, one term is missing. Find the missing term.
3, 5, 20, 24, 144, 150, ?
1029, 1030, 1039, 1064, ?, 1194
75, 80, 95, ?, 155, 200
What will come in place of the question mark (?) in the following series?
1515, 184, ?, 455, 967, 624
7 29 61 ? 211 349
...
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