self Maths Puzzle

A right triangle with sides 3 cm, 4 cm and 5 cm is rotated the side of 3 cm to form a cone. The volume of the cone so formed is:

A. 12 cm3 B. 15 cm3
C. 16 cm3 D. 20 cm3

Read Solution (Total 2)

options are wrong it should be 12pie cm cube
11 years agoHelpfull: Yes(1) No(1)

volume = 1/3 pie r square h
where r=3 (from question)
h=4
put these values :
1/3 pie *3*3 * 4
12 pie cm cube
11 years agoHelpfull: Yes(1) No(0)

self Other Question

3.87 - 2.59 = ?

A. 1.20 B. 1.2
C. 1.27 D. 1.28
A hall is 15 m long and 12 m broad. If the sum of the areas of the floor and the ceiling is equal to the sum of the areas of four walls, the volume of the hall is:

A. 720 B. 900
C. 1200 D. 1800