Jawabanmu

2014-05-01T00:19:49+07:00
Luas = p x l = 100 x 25 = 250m Banyak putaran 400m = 400m / 250m = 1,6 putaran
2014-05-01T00:21:30+07:00
Keliling = 2.( p+l)
           = 2.( 100 + 25)
           = 2. 125
           = 250
Berlari 400 m, maka 400 - 250 = 150
150/250 = 3/5
Maka andi berkeliling 1 3/5 putaran