A boat takes half time in moving a certain distance downstream than upstream. what is the ratio between the rate in still water and the rate of current?
(A) 2 : 1
(B) 3 : 1
(C) 1 : 2
(D) 1 : 3
A boat running downstreams covers a distance of 30 kms in 2 hours. While coming back the boat takes 6 hours to cover the same distance. If the speed of the current is half that of the boat, what is the speed of that boat in kmph?
(A) 15
(B) 5
(C) 10
(D) Cannot be determined
(E) None of these
A fraction becomes
(A) 5
(B) 70
(C) 14
(D) 350
The smallest number, which when increased by 5 is divisible by each of 24, 32, 36 and 54, is
(A) 571
(B) 427
(C) 869
(D) 859
A square and an equilateral triangle are of the same perimeter. If the diagonal of the square is
(A)
(B)
(C)
(D)
A cuboidal block of 6 cm × 9 cm ×12 cm is cut into exact number of equal cubes. The least possible number of cubes will be:
(A) 6
(B) 9
(C) 24
(D) 30
If
(A) 0
(B) -1
(C) 1
(D)
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