Question

how much metal sheet is required to make an open cylindrical tank of radius 4.2 M and height 15 m​

Answer 1

Curved surface of cylinder=2πrh

= 2×22÷7×4.2×15=396 Metre metal sheet is required

Answer 2

Answer:

Metal required to make an open cylinder tank means curved surface area of cylinder = 2πrh

= 2×22/7×4.2×7

= 184.8