Two circular wheels of the same radius `r` have their central hubs at a distance of `a` from one another. The minimum length of a fan belt which will pass around both the wheels is (FIGURE) `2(a+pir)` (b) `a+(pi\ r)/2` (c) `2a+pir)` (d) `(a+pi\ r)/2`

Two circular wheels of the same radius r have their central hubs at a distance of a from one another.The minimum length of a fan belt which will pass around both the wheels is ( FIGURE) 2(a+pi r)( b) a+(pi backslash r)/(2) (c) 2a+pi r)(d)(a+pi backslash r)/(2)

In one revolution of this wheel and axle, the effort is lowered a distance of 2pi R cm. What distance is the load raised?

If r is the radius and h is height of the cylinder the volume will be (1)/(3)pi^(2)h(b)pi r^(2)h(c)2 pi r(h+r)(d)2 pi rh

Circumference of a circle with radius r will be 2pir . (True/ false)

1.Circles of radius 2 are centered at the vertices of a triangle with sides lengths 8,11 and 12. Find the length of a belt that fits tightly around those three circles as shown in the figure (A) 31+4pi(B)31+6pi(C)31+pi(D)31+2pi.

If r is the radius and h is height of the cylinder the volume will be (a) 1/3pi^2h (b) pir^2h (c) 2pir\ (h+r) (d) 2pir h

If the radius of the base of a right circular cone is 3r and its height is equal to the radius of the base, then its volume is (a) 1/3pir^3 (b) 2/3 pir^3 (c) 3pir^3 (d) 9pir^3

The area of a circle is given by A=pir^(2) , where r is the radius . Calculate the rate of increases of area w.r.t. radius.

The area of a circle is given by A=pir^(2) , where r is the radius . Calculate the rate of increases of area w.r.t. radius.

State whether each of the following statements is true or false : The distance travelled by a circular wheel of a diameter d cm in one revolution is 2pi d cm .