Mathematics
Assertion (A) : If radius of a right circular cylinder is double and the height is reduced to of the original, the ratio of volume of new cylinder thus formed to the volume of the original cylinder is 1 : 1. Reason (R) : Volume of a cylinder = πr2h where r is the radius of the circular base and h is height. 1. Both A and R are correct, and R is the correct explanation for A. 2. Both A and R are incorrect. 3. A is true, but R is false. 4. A is false, but R is true.
Related Questions
Assertion (A) : Three solid silver cubes of side 6 cm, 8 cm and 10 cm are melted and recasted into a single solid cube. The side of the new cube = 2 times the side of the smallest cube.
Reason (R) : Volume of cuboid = (l x b x h) cubic units.
Both A and R are correct, and R is the correct explanation for A.
Both A and R are correct, and R is not the correct explanation for A.
A is true, but R is false.
A is false, but R is true.
Assertion (A) : The length, breadth and height of the cuboid are 15 cm, 12 cm and 9 cm respectively. Lateral surface area of the cuboid = 846 cm2.
Reason (R) : Lateral surface area of cuboid = 2 x h x (l + b) square units.
Both A and R are correct, and R is the correct explanation for A.
Both A and R are correct, and R is not the correct explanation for A.
A is true, but R is false.
A is false, but R is true.
A cuboid is 8 m long, 12 m broad and 3.5 m high. Find its
(i) total surface area
(ii) lateral surface area
How many bricks will be required for constructing a wall which is 16 m long, 3 m high and 22.5 cm thick, if each brick measures 25 cm x 11.25 cm x 6 cm ?