Question

几道数学应用题1,一块长方形钢板,长1.2米,宽0.8米.从这块钢板上截下一块两边长约为0.5米,底边长为0.6米,高0

Answer 1

(1)s1=1/2*0.5*0.6=0.15 s2=1.2*0.8=0.96 s3=0.96-0.15=0.81

(2)c=1.2+1.2+0.8+0.2+0.5+0.5=4.4 c=0.8+0.8+0.6+0.5+0.5=3.2

c=0.5+0.5+0.6+0.6+0.8+0.8+1.2+1.2=6.2

144/ (6+5+4)=144/15 144/15*6=9.6*6=57.6 9.6*5=48 9.6*4=38.4