Question

The curved surface area of a cylindrical pillar is 440 cm and its volume is
1520 cm. Find the height of the pillar.​

Answer 1

Answer:

Step-by-step explanation:

Given,2πrh=440 cm........(1)

πr×r×h=1520 cm........(2)

(2)÷(1)

π×r×r×h ÷ 2πrh =1520÷440

r÷2= 1520÷440

r= 1520×2÷440

r=6.9 cm

2π×6.9×h=440

h=440×7÷6.9×2×22

h= 3080÷303.6

h= 10.1 cm ( approximately)