The radius of a cylinder is doubled but its lateral surface area is unchanged. Then its height must be

If the radius of a cylinder is tripled but its curved surface area is unchanged, then its height will be

If the radius of a cylinder is doubled and its curved surface area is not changed, the height must be halved.

Write True or False and justify your answer in each of the following: If the radius of a cylinder is doubled and its curved surface area is not changed, the height must be halved.

If the radius of a cylinder is doubled keeping its lateral surface area the same, then what is its height ?

If the radius of a cylinder is doubled keeping its lateral surface area the same, then what is its height ?

If the radius of a cylinder is doubled keeping its lateral surface area the same, then what is its height ?

If the radius of a cylinder is doubled keeping its lateral surface area the same, then what is its height ?

If the radius of a cylinder is doubled keeping its lateral surface area the Same, then what is its height ?

If the radius of a cylinder is doubled keeping its lateral surface area the same, then what is its height ?

If the radius of the cylinder is 7.7 m and its curved surface area is 619.52 sq m, then find its height