Total Steps =60
lets say total steps = x
First he climbs up to the middle step , i.e. x/2
Then he climbs up 8 steps, i.e. x/2+8
Then he walks down 12 steps i.e. x/2+8-12
Then he takes one step up i.e. x/2+8-12+1
Now, he walks up the remaining steps 3 at a time which only takes him 9 paces. i.e. 3X9=27
Equating both the sides,
x/2+8-12+1 = 27
or, x/2 - 3 =27
or, x/2 = 30
thus, x=60
Hence total steps were 60