Question
A car running with a speed of ‘x’ m/sec makes 7
rounds of a circular field having radius 21 metres, in 12 seconds. Find the time taken by car to cover 228 metres with the speed of (x – 20) m/sec.Solution
Distance covered by the car = 7 × 2πr = 2 × (22/7) × 21 × 7 = 924 metres Speed of the car = 924/12 = 77 m/sec Required time taken = 228/(x – 20) = 228/57 = 4 seconds
Statements:
Some teachers are scientists.
All scientists are doctors.
All doctors are engineers.
Conclusions:
I. ...
Which of the following numbers will replace the question mark (?) in the given series?
42, 53, 46, ?, 53, 66
Which of the following letter-clusters will replace the question mark (?) in the given series?
YTM, AQQ, CNU, ?, GHC
Select the figure from among the given options that can replace the question mark (?) in the following series.
Which two signs should be interchanged to make the following equation correct?
16× 25÷ (121 - 11) = 389
Two statements are given followed by two conclusions numbered I and II. Assuming the statements to be true, even if they seem to be at variance with com...
Which two numbers (not digits) should be interchanged to make the given equation correct?
116 - 92 ÷ 4 + 25 × 2 - 20 = 150
A, B, C and D are sitting around a circular table facing the centre. Who sits to the immediate right of A?
Statements:
(I) C sits to the...
Three Statements are given followed by two conclusions numbered I and II. Assuming the statements to be true, even if they seem to be at variance with c...
Four letter-clusters have been given, out of which three are alike in some manner and one is different. Select the incongruous letter-cluster.
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