Question

a man walks a certain distance at a certain speed . had he walked 1/2 km/hr faster,he would have taken one hour less. but if he had walked 1km/hr slower, he would have taken 3 hours longer. the distance travelled by the man is:?

Answer 1

assume speed be 'x' , distance 'd' , time be 't'
we know distance equals product of speed and time taken
we can make three equations and then solve
x=d/t
(x+0.5)=d/(t-1)
(x-1)=d/(t+3)
now we can solve for distance 'd'..