An old man can reach a certain place in 15 hours. If he reduces his speed by 130th, he goes 5 km less in that time. Find his speed.
10 kmph
Let the speed be 's' and the distance covered be 'd'.
∴s = d15 - (i) and 29s30 = d−515 - (ii)
Solving both the equations, we get s = 10 kmph