Question

A small cylindrical has a diameter of 18mm and a height 12mm. Determine the minimum surface area of a box that can hold a row of five candles

Answer 1

The surface are of a box = 1186.92 mm²

Explanation:

Given in question as :

Diameter of cylinder = 18 mm

The height of cylinder = 12 mm

The surface area of cylinder = ( 2×
`\pi`×r×h) + (2×
`\pi`×r²)

where R is the radius , R =
`(Diameter)/(2)` =
`(18)/(2)`

Or Radius r = 9 mm

Or, The surface area of cylinder= ( 2×
`\pi`×9×12) + 2×
`\pi`×(9)²)

Or , The surface area of cylinder=(678.24) + (508.68)

Or ,The surface area of cylinder= 1186.92 mm²

Hence the surface are of a box = 1186.92 mm² Answer