Question

Can anyone please solve (a) and also (b)?
Please with explanation.​

Answer 1

Step-by-step explanation:

a ka answer is as follows

the shaded portion is 23cmsqure

and b ka answer is as follows

the shaded portion is 12cmsqure

Answer 2

Answer:

a) 144.64

b) 196

Step-by-step explanation:

a)

if you see clearly for the first figure

width of the rectangle is diameter of one circle

and length is 3 diameters

so b=15

l=45

area of the rectangle =15*45=675

and area of the circles = 3*22/7*(15/2)^2=530.36

so the shaded area = 675-530.36=144.64

b)

area of the triangle =70

area of the triangle =(1/2)*base*height

=(1/2)*base*10=70

=(1/2)*base=70/10=7

base=7*2=14

since it is a equilateral triangle so radius also 14

so area of the circle =(22/7)*14*14=616

and area of the six triangles =6*70=420

so shaded area =616-420=196