Question

The area of a circular lawn is 154m2 find its circumference ​

Answer 1

Step-by-step explanation:

Area of circular lawn = 154 m2

πr sq. =154

22/7 × r sq. = 154

r sq.= 154×7/22

r sq. = 49

r = 7

Circumference of circular lawn = 2πr

=2 × 22/7 × 7

= 44

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Answer 2

HI FRIEND! HERE IS YOUR ANSWER WITH STEP BY STEP EXPLANATION.

Answer: ANSWER IS 44 m.

STEP BY STEP EXPLANATION:-

AREA OF CIRCULAR LAWN = 154 m²(GIVEN)  (1ST EQUATION)

AREA OF CIRCULAR LAWN = πr²                    -(2ND EQUATION)

THEREFORE, BY 1ST AND 2ND EQUATION:-

154 = πr²

(AS π=22)

            7

SO, 154 = 22 ×r²

                  7

154×7 = r²

  22          

1078 = r²

 22

49 = r²

√49 = r

7 metres = r

THEREFORE, RADIUS (r) = 7 m

CIRCUMFERENCE = 2πr

CIRCUMFERENCE = 2×22×7

                                         7

CIRCUMFERENCE= 2×22

HENCE, CIRCUMFERENCE= 44 m

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