A boys walks to cover certain distance. If he walked 2 km/hr faster he would have taken1 hour less. If he had moved 1 km/hr slower he would have taken 1 hour more. The distance travelled is:
A12 km
B10 km
C14 km
D8 km
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സമിർ 200 മി. ഓടുവാനായി 24 സെക്കന്റെ എടുത്തു. സമിറിന്റെ സ്പീഡ് എത്ര ?
What is the average speed of a car which covers half the distance with a speed of 28 km/h and the other half with a speed of 84 km/h?