1.

a rectangular piece of paper 33cm × 10cm is folded without overlapping to make a cylinder of height 10 cm. find the volume of cylinder .​

Answer»

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According to question:-

33 cm is also the circumference of the CIRCLE formed.

Therefore,

2\pi \: r = 33

2 \times  \frac{22}{7}  \times r = 33

r = 33 \times  \frac{7}{44}

r = 3 \times  \frac{7}{4}

r =  \frac{21}{4}

r = 5.25 \: cm

VOLUME,

= \pi \:  {r}^{2} h

=  \frac{22}{7}  \times 5 \times 5 \times 10

=  \frac{22 \times 250}{7}

= \frac{5500}{7}

= 785.7 {cm}^{3}



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