422.92cm
149.92cm
44.00cm
43.96cm
Correct answer is C
r = 16, R = 23; 2πR−2πr
= 2π(R−r)
= 2 x 227(23−16)
= 2 x 227×(7)
= 44cm
Triangle OPQ above is the solution of the inequalities ...
Simplify 2.250.015 leaving your answer in standard form...
Differentiate (x2 - 1/x)2 with respect to x ...
Find the number of sides of a regular polygon whose interior angle is twice the exterior angle. ...
If y varies directly s the square root of (x + 1) and y = 6 when x = 3, find x when y = 9 ...
If duty is levied at 25%, find the duty to be added to a bill of N80. ...
Find the radius of a sphere whose surface area is 154 cm2? ...
If r varies inversely as the square root of s and t, how does s vary with r and t? ...