Convert the 12/43 m/s into kilometers per hour?
Options:
(A) 3.5 kmph.
(B) 2.5 kmph.
(C) 1 kmph.
(D) 1.5 kmph.
(E) 1.9 kmph.

12/43 m/s = 12/43 * 18/5 = 1 (1/250) = 1 kmph. So the answer is: (C).

The speed of a car is 80 km in the first hour and 60 km in the second hour. What is the average speed of the car?
Options:
(A) 50 kmph
(B) 60 kmph
(C) 70 kmph
(D) 80 kmph
(E) 85 kmph

S = (80 + 60)/2 = 70 kmph So the answer is: (C).

Find the least number must be subtracted from 5474827 so that remaining no.is divisible by 12?
Options:
(A) 3
(B) 5
(C) 4
(D) 7
(E) 2

On dividing 5474827 by 12 we get the remainder 7, so 7 should be subtracted So the answer is: (D).

Find the simple interest on Rs.450 for 8 months at 5 paisa per month?
Options:
(A) 277
(B) 270
(C) 180
(D) 266
(E) 121
I = (450*8*5)/100 = 180 So the answer is: (C).