Mathematics
Assertion (A): From a solid wooden cylinder of height 15 cm and diameter 14 cm, of conical cavity of same height and same base diameter is hollowed out. The volume of the cone is 770 cm3.
Reason (R): The volume of a cylinder of height h and radius r is πr2h.
Related Questions
A solid sphere is cut into identical hemispheres.
Statement 1 : The total volume of two hemispheres is equal to the volume of the original sphere.
Statement 2 : The total surface area of two hemispheres together is equal to the surface area of the original sphere.
Which of the following is valid ?
Both the statements are true
Both the statements are false
Statement 1 is true, and statement 2 is false
Statement 1 is false, and statement 2 is true
A cylindrical container is to be made of tin sheet. The height of the container is 1 m and its diameter is 70 cm. If the container is open at the top and the tin sheet costs 300 per m2, find the cost of the tin for making the container.