A circular pond of radius 28 m has a paved walkway 7 m wide running all around the OUTSIDE. Find the area of the walkway. Use π = 22/7 (answer in m²).

Question

Accepted Answer

1386. Outer radius = 28 + 7 = 35 m. Walkway = π(R² − r²) = 22/7(35² − 28²) = 22/7(1225 − 784) = 22/7 × 441 = 1386 m². Using the 7 m WIDTH as a radius (22/7 × 49 = 154) is the classic trap; 3850 and 2464 are the outer and inner circles on their own.

A circular pond of radius 28 $m$ has a paved walkway 7 $m$ wide running all around the OUTSIDE. Find the area of the walkway. Use π = $\frac{22}{7}$ (answer in $m^{2}$ ).

Step-by-Step Solution

Key idea: Area of a circle

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More Class 7 Perimeter and Area practice

A circular pond of radius 28 m has a paved walkway 7 m wide running all around the OUTSIDE. Find the area of the walkway. Use π = 722​ (answer in m2).

Step-by-Step Solution

Key idea: Area of a circle

Master this chapter in 30 minutes a day.

More Class 7 Perimeter and Area practice

A circular pond of radius 28 $m$ has a paved walkway 7 $m$ wide running all around the OUTSIDE. Find the area of the walkway. Use π = $\frac{22}{7}$ (answer in $m^{2}$ ).