The ratio of the area of a circle to the area of its semicircle is

(a)

2:1

(b)

1:2

(c)

4:1

(d)

1:4

Area of a circle of radius ‘n’ units is

(a)

2πr^p sq. units

(b)

πm² sq. units

(c)

πr² sq. units

(d)

πn² sq. units

The formula to find the area of the circular path is

(a)

π(R² − r² ) sq. units

(b)

πr² sq. units

(c)

2πr² sq. units

(d)

πr² + 2r sq. units

The formula used to find the area of the rectangular path is

(a)

π(R² − r² ) sq. units

(b)

(L × B) − (l × b) sq. units

(c)

LB sq. units

(d)

lb sq. units

The formula to find the width of the circular path is

(a)

( L − l ) units

(b)

( B − b ) units

(c)

( R − r ) units

(d)

( r − R ) units