Math, asked by suhani8783, 10 months ago

solve it correctly

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Answered by pratyushmishra10000
0

Answer:

The approximate value of π( Pi) is= 22/7 

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Solution:

i)

Given:

Diameter = 2.8 cm

Radius= 2.8/2= 1.4 cm

Perimeter of the figure = Perimeter of Semicircular part + Diameter of the part

= πr + 2r

=(22/7) × (1.4)  + 2.8

= 22× .2 + 2.8 = 4.4+ 2.8

=7.2 cm

 

 

ii)

 

Given :

Diameter = 2.8 cm

Radius= 2.8/2= 1.4 cm

 

 Perimeter of the figure = Perimeter of Semi-circular part + 2Length + Breadth

= πr +L+ 2B

= 22/7× 1.4  + 2.8+ 2× 1.5

= 22×.2 + 2.8+ 3

=4.4 + 2.8+ 3

=10.2 cm

 

iii)

Given :

Diameter = 2.8 cm

Radius= 2.8/2= 1.4 cm

Slant height= 2 cm

 

 Perimeter of the shape = Perimeter of Semi-circular part + 2(slant height)

 

= πr + 2 (slant height)

= 22/7× 1.4  +2+2

 

=4.4 + 4

=8.4 cm

Hence, the food shape in (b) requires the ant to cover the more distance.

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Hope this will help you...

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