Question
A man standing in a point C of a ground. He observes a
flying an aero-plane in the east at an angle of elevation of 30° and after 30 seconds, he observes the same aero-plane in the west at an angle of elevation of 60°. If the aero-plane flies all along in a straight line at a height of 480√3 m, then its speed in km/h is:Solution
From the following figure, 
AB = ED = 480√3 AE = BD In Δ ABC, tan 30 = AB/BC 1/√3 = 480 √3/BC BC = 480 × 3 = 1440 In Δ EDC, tan 60 = ED/DC √3 = 480 √3/DC
Five girls P, Q, R, S and T sit around a circular table facing towards the centre (not necessarily in the same order). Only one girl sits between S and ...
Which of the following numbers will replace the question mark (?) in the given series?
213, 199, 235, 221, 257, 243, ?
In a certain code language, ‘LIFE’ is coded as ‘9351’ and ‘NEAR’ is coded as ‘4692’.
What is the code for ‘E’ in the given co...
Two statements I and II are given. These statements may be either independent causes or may be the effects of independent causes or a common cause. One ...
In the following question below are given some statements followed by some conclusions based on those statements. Taking the given statements to be tru...
Statement:
A. All germanium is lithium.
B. Some deuteron are plumbum.
C. Some germanium is chlorine.
Conclusion:
(I) ...
Out of the four words listed, three are alike in some manner and one is different. Select the odd one.
If A, B, C, D and E denote +,  ̶ , ×, ÷ and =, respectively, then which of the following options is correct?
20480, 10240, 5120, 2550, 1280
Rearrange the jumbled up letters to form a meaningful word and find the odd one out.
Relevant for Exams:
