Ques: A train running at the speed of 60 km/hr crosses a pole in 21 seconds. Find the length of the train.
Options:
(A) 350 m
(B) 145 m
(C) 240 m
(D) 135 m
(E) 255 m
Ans: (A)
CoT: Speed = 60*(5/18) m/sec = 50/3 m/sec
Length of Train (Distance) = Speed * Time
(50/3) * 15 = 350 meter

Ques: If Rs.7500 are borrowed at C.I at the rate of 4% per annum, then after 5 years the amount to be paid is?
Options:
(A) 3377
(B) 2688
(C) 2688
(D) 9125
(E) 1268
Ans: (D)
CoT: A = 7500(26/25)^5 = 9125

Ques: How much more would Rs.20000 fetch, after two years, if it is put at 20% p.a. compound interest payable half yearly than if is put at 20% p.a. compound interest payable yearly?
Options:
(A) 482
(B) 725
(C) 992
(D) 837
(E) 923
Ans: (A)
CoT: 20000(11/10)4 - 20000(6/5)2 = 482

Ques: A 160 meter long train crosses a man standing on the platform in 18 sec. What is the speed of the train?
Options:
(A) 96 kmph
(B) 94 kmph
(C) 32 kmph
(D) 56 kmph
(E) 76 kmph
Ans: (C)
CoT: S = 160/18 * 18/5 = 32 kmph