A train 360 meters long is running with a speed of 54 kmph. The time taken by it to cross a tunnel 120 meters long is?
Options:
(A) 29
(B) 18
(C) 48
(D) 99
(E) 32
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D = 360 + 120 = 480
S = 54 * 5/18 = 15 mps
T = 480/15 = 32 sec So the answer is: (E).
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P can do a work in 24 days. Q can do the samework in 9 days & R can do the same work in 12 days. Q & R start the work and leave after 3 days. P finishes the remaining work in how many days.
Options:
(A) 8
(B) 10
(C) 14
(D) 16
(E) 19
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Work done by P in 1 day = 1/24
Work done by Q in 1 day = 1/9
Work done by R in 1 day = 1/12
Work done by Q and R in 1 day = 1/9 + 1/12 = 7/36
Work done by Q and R in 3 days = 37/36 = 7/12
Remaining work = 1 7/12 = 5/12
Number of days in which P can finish the remaining work = (5/12) / (1/24) = 10 So the answer is: (B).
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Find the odd man out
253, 136, 352, 329, 631, 244
Options:
(A) 329
(B) 136
(C) 352
(D) 631
(E) 531
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The sum all three digits comes to 10 except 329 So the answer is: (A).
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