Reasoning: Speed = 60 * 5/18 = 50/3 m/sec
Length of the train = speed * time = 50/3 * 18 = 300 m
Ans: (C)
Question: A train running at the speed of 60 km/hr crosses a pole in 18 sec. What is the length of the train?
Options:
(A) 356
(B) 278
(C) 300
(D) 279
(E) 150
Rationale: Work done by A in 2 days = 2/5
Remaining work = 3/5
Work done by both A and B in one day = 1/5 + 1/10 = 3/10
Remaining work = 3/5 * 10/3 = 2 day
The answer: (B)
Question: A and B can do a work in 5 days and 10 days respectively. A starts the work and B joins him after 2 days. In how many days can they complete the remaining work?
Options:
(A) 6
(B) 2
(C) 3
(D) 4
(E) 98
Reasoning: P = (P*30*R)/100
R = 3 1/3%
Ans: (A)
Question: At what rate percent on simple interest will a sum of money double itself in 30 years?
Options:
(A) 3 1/3%
(B) 3 5/3%
(C) 3 1/9%
(D) 3 1/5%
(E) 3 1/7%
Rationale: Option 'B'
The total number of arrangements is
10P10 = 10! = 3628800
The answer: (B)
Question: In how many different ways can the letters of the word "NEGLIGENCE" be rearrangement?
Options:
(A) 3628800
(B) 3628800
(C) 3628812
(D) 3428800
(E) 3368800
Reasoning: Area of an equilateral triangle = 3/4 S2
If S = 8, Area of triangle = 3/4 * 8 * 8 = 163 cm2;
Ans: (C)
Question: What is the are of an equilateral triangle of side 8 cm?
Options:
(A) 645
(B) 649
(C) 163
(D) 643
(E) 642
Reasoning: 100 * 100 = 10000
125 * 80 = 10000
Ans: (A)
Question: The length of a rectangle is increased by 25% and its breadth is decreased by 20%. What is the effect on its area?
Options:
(A) 10000
(B) 297
(C) 9279
(D) 2767
(E) 2676