Question

A sandglass is a device used to measure time. It is also known as an hour glass, sand

timer or sand clock. Generally, It consists of two glass Bulbs Placed one above the

other which are connected by a narrow tube.

A special sand glass is shown in fig. In it, two Cones A and B are placed in a

cylindrical tube such that their vertex touch each other inside the tube. The height

of the cylinder is 21cm and the diameter is 6cm.Both cone are identical

(a) The Capacity of each Cone is

(a) 144 cm2 (b) 121 cm2 (c) 99 cm2 (d)88cm2

(b) The outer surface are of cylinder glass is

(a) 268.36 cm2 (b)396.85 cm2

(c)401.69 cm2 (d)452.57 cm2

(c) The volume of the remaining portion of the cylinder is

(a) 255 cm2 (b)369 cm2

(c)409 cm2 (d)460 cm2

(d) The sum of areas of bases of cones is

(a) 56.57 cm2 (b)78.34 cm2

(c)84 (d)68.5 cm2

(e) Curved surface area of the cylindrical glass

(a) 272 cm2 (b)396 cm2

(c) 420 cm2 (d) none of these​​

Answer 1

Answer:

jfdjsg4763525225twwtwt3658589658tw4q436680