A circular running track is formed between two circles with the same centre. The outer radius is 21 m and the inner radius is 14 m. Find the area of the track (the shaded ring). (Take π = 22/7)

Question

Accepted Answer

770 m^2. Outer area = 22/7*21*21 = 1386 m^2. Inner area = 22/7*14*14 = 616 m^2. Track = 1386 - 616 = 770 m^2.

A circular running track is formed between two circles with the same centre.
The outer radius is 21 m and the inner radius is 14 m.
Find the area of the track (the shaded ring). (Take π = $\frac{22}{7}$ )

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 7 Area of a Circle practice

A circular running track is formed between two circles with the same centre.The outer radius is 21 m and the inner radius is 14 m.Find the area of the track (the shaded ring). (Take π = 722​)

Step-by-Step Solution

Master this chapter in 30 minutes a day.

More Class 7 Area of a Circle practice

A circular running track is formed between two circles with the same centre.
The outer radius is 21 m and the inner radius is 14 m.
Find the area of the track (the shaded ring). (Take π = $\frac{22}{7}$ )