Question

6. The radius of a cylinder in doubled and the height
remains the same. The ratio between the volumes
of the now cylinder and the original cylinder is:
(a.) 1:2 (6) 3:1 (9 4:1
d) 8:1​

Answer 1

Answer:

C

Step-by-step explanation:

we know that

Volume of a cylinder = πr²h

here when the radius of a cylinder is doubled while the height remains same

the radius of original cylinder = r

the radius of the new cylinder = 2r

since h remains the same

the ratio of there volumes = π(2r)²h /πr²h

= 4r²/ r² = 4/1

=> the ratio between the volumes of the new cylinder and the original cylinder = 4:1 answer