Rationale: Speed = 90*(5/18) m/sec = 25 m/sec
Length of Train (Distance) = Speed * Time
(25) * 6 = 150 meter
The answer: (A)
Question: A train running at the speed of 90 km/hr crosses a pole in 6 seconds. Find the length of the train.
Options:
(A) 150 meter
(B) 100 meter
(C) 105 meter
(D) 120 meter
(E) 130 meter
Reasoning: Speed = 60*(5/18) m/sec = 50/3 m/sec
Length of Train (Distance) = Speed * Time
(50/3) * 9 = 150 meter
Ans: (A)
Question: A train running at the speed of 60 km/hr crosses a pole in 9 seconds. Find the length of the train?
Options:
(A) 150 meter
(B) 166 meter
(C) 154 meter
(D) 146 meter
(E) 141 meter
Rationale: The other parts are equal to 1000.
The answer: (B)
Question: Four of the five parts numbered (a),(b),(c),(d) and (e) in the following sequence are exactly equal. Which part is not equal to the other four? The number of that part is the answer
Options:
(A) 120 12 22 20
(B) 10% of 5000 + 25 of 1200
(C) 80 40 20 110
(D) 8640 60 + 53.5 16
(E) 5314 3029 1285
Reasoning: 31. only the perfect squares between 1 to 1k
Ans: (B)
Question: There are 1000 doors that are of the open-close type. When a person opens the door he closes it and then opens the other. When the first person goes he opens-closes the doors in the multiples of 1 i.e., he opens and closes all the doors. when the second goes he opens and closes the doors 2, 4 6 8 respectively. Similarly when the third one goes he does this for 3 6 9 12 15th doors respectively. Find number of doors that are open at last.
Options:
(A) 29
(B) 31
(C) 32
(D) 24
(E) 21
Rationale: A number ending with 2 can never be a perfect square.
The answer: (B)
Question: How many three-digit numbers satisfy this property.: The last digit (unit's digit) of the square of the two-digit number is 2 ?
Options:
(A) 8
(B) 0
(C) 6
(D) 10
(E) 12
Rationale: 22/7 * 14 * 3/2 * 3/2 = 99 m2
99 * 15 = 1485
The answer: (D)
Question: Find the expenditure on digging a well 14m deep and of 3m diameter at Rs.15 per cubic meter?
Options:
(A) Rs.1185
(B) Rs.1285
(C) Rs.1385
(D) Rs.1485
(E) Rs.1495