Question

The length of inner track of a circular ring is 132m.If the width of path is 7m. then the area of the ring is?

Answer 1

Radius of inner track=132÷(2×22/7)
=132×7/44
=21m

Radius of the outer track=21m+7m=28m

Area of inner track =22/7×21×21
=1386m sq.

Area of outer track =22/7×28×28
=2464m sq.

Area of ring =area of outer track- area of inner track =2464m-1386m= 1078m sq

Answer 2

Answer:

Radius of inner track=132÷(2×22/7)

=132×7/44

=21m

Radius of the outer track=21m+7m=28m

Area of inner track =22/7×21×21

=1386m sq.

Area of outer track =22/7×28×28

=2464m sq.

Area of ring =area of outer track- area of inner track =2464m-1386m= 1078m sq