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Let the height of the building be h meters, and the initial distance from the point on the ground to the building be d. From the first observation: tan(60°) = h/d, so h = d√3. From the second observation: tan(75°) = h/(d - 20). 2+√3= d√3/(d - 20) d = 10(√3+2) meters. Correct option: c
16, 8, 8, 12, ?, 60
7 12 33 ? 635 3804
...140, 146, 170, 224, ?, 470
37, 57, 82, ?, 147, 187
84, 63, ?, 283.5, 1701
Find the missing character.
12, 25, 51, ?, 207, 415
28, 43, 73, 118, ?, 253
Which of the following number will replace the question mark (?) and complete the given number series?
4, 5, 12, 39, 160, ?