Find the area of a circle whose radius is 7 cm.

Question

If the distances of the point \( (1,2,a) \) from the line \[ \frac{x-1}{1}=\frac{y}{2}=\frac{z-1}{1} \] along the lines \[ L_1:\ \frac{x-1}{3}=\frac{y-2}{4}=\frac{z-a}{b} \quad \text{and} \quad L_2:\ \frac{x-1}{1}=\frac{y-2}{4}=\frac{z-a}{c} \] are equal, then \( a+b+c \) is equal to:

Answer 1

The area of a circle is calculated using the formula: \[ \text{Area} = \pi r^2 \] With a radius \( r = 7 \, \text{cm} \), substituting this value into the formula yields: \[ \text{Area} = \pi \times (7)^2 = 49\pi \, \text{cm}^2 \] Consequently, the circle's area is \( 49\pi \, \text{cm}^2 \), corresponding to option (1).

Find the area of a circle whose radius is 7 cm.

Show Hint

The Correct Option is A

Solution and Explanation

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