Question

在一个周长是125.6米的圆形花坛分别种上月季花和草坪.已知种月季花的面积和草坪的面积比是1:3

Answer 1

花坛的半径r=c÷2÷π

=125.6÷2÷3.14

=20

花坛面积s=π*r^2

=3.14*20*20

=3.14*400

=1256m^2

草坪面积=1256*3/(3+1)

=1256*3/4

=314*3

=942m^2