The speed of the current is 5 km / hour. A motorboat goes 10 km upstream and back again to the starting point in 50 minutes. The speed (in km / hour) of the motorboat in still water is:
(A) 20
(B) 26
(C) 25
(D) 28
A boat travels 24 km upstream in 6 hours and 20 km downstream in 4 hours. Then the speed of boat in still water and the speed of current are respectively.
(A) 4 kmph and 3 kmph
(B) 4.5 kmph and 0.5 kmph
(C) 4 kmph and 2 kmph
(D) 5 kmph and 2 kmph
The LCM of two multiples of 12 is 1056. If one of the numbers is 132, the other number is
(A) 96
(B) 132
(C) 12
(D) 72
When a number is divided by 15, 20 or 35, each time the remainder is 8. Then the smallest number is
(A) 328
(B) 338
(C) 428
(D) 427
What will be the area (cm2) of the curved surface of an elliptical cylinder whose height and diameter are 10 cm and 8 cm respectively?
(A) 20 π
(B) 80 π
(C) 160 π
(D) 40 π
If a cube whose side is 7.5 cm, what will be its volume?
(A)
(B)
(C)
(D)
Which of the following is largest fraction amongst
(A)
(B)
(C)
(D) None of these
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