Find the area of the circle, given that: diameter = 49 m (Take π =22 7 ) I need the answer from NCERT C7 ​
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Solution:

(a) Radius of the circle = 14 mm

Area of circle = πr2

= 22/7 × 14 mm × 14 mm

= 22 × 2 mm × 14 mm

= 616 mm2

(b) Diameter of the circle = 49 m

Therefore, radius = diameter/2 = 24.5 m

Area of circle = πr2

= 22/7 × 24.5 m × 24.5 m

= 22 × 24.5 m × 3.5 m

= 1886.5 m2

(c) Radius of the circle = 5 cm

Area of circle = πr2

= 22/7 × 5 cm × 5 cm

= 550/7 cm2

= 78.57 cm2

A=1

4πd2=1

4·π·492≈1885.74099m²

Step-by-step explanation:

5+2x=a

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the answer is:

the correct option:

b.

to solve the problem, we need to remember how to operate to simplify exponential expressions using the logarithms.

we are given the equation:

then, using placing logarith with base 7 on both sides of the equation, we have:

so, rounding the obtained result to two decimal places (nearest hundreth), we have:

hence, we have that the correct option:

b.

have a nice day!