Question

help me .........................

Answer 1

area of rectangle = l×b
=20×11 =
$220 {cm}^{2}$
area of circle =
$\pi \: {r}^{2}$

=22/7×8=25.14
area of shaded portion=area of rectangle - area of circle
= 220-25.14=194.86

Answer 2

Answer:Area of cross section of river= 2 x 45 = 90 m²

so, water flowing into the sea= area of cross section x rate of flowing water

= 90 x 3000

= 270000 m³

there water flowing per minute= 270000 / 60 = 4500 m³

Step-by-step explanation: