Question

) How much metal sheet will be required to make a closed cylinder of height I m and diameter 140 cm?​

Answer 1

Step-by-step explanation:

metal sheet required to make cylinder = perimeter of cylinder.

Perimeter of cylinder =

$2\pi \: r \: h$

diameter = 140 cm

height = 1m = 100 cm

Perimeter =

$2 \times \frac{22}{7} \times \frac{140}{2} \times 100$

$2 \times 22 \times 20 \times 50$

$= 44 \times 1000$

$= 44000 \: cm$

Answer 2

Answer:Total Surface Area of cylinder is= 2πrh+2πr*r  

                                                                  =2πr(h+r)=2×22/7 ×(70)(100+70)

                                                                  =7.48m sq.  

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