Question

四年应用题1.一个长方形水池,长15米,宽8米,池内水深1.57米.池内有根出水管,内直径2分米,放水时出水管内的水流速

Answer 1

1.

15*8*1.57=188.4(m^3)

0.2*0.2*3.14*2*60=15.072(m^2)

188.4/15.072=12.5(min)

2.

(15+23+5)/(15+23+5+2)=95.6%

(13+28+7)/(13+28+7+3)=94.1%

1大