Question

find the volume of cylinder d=2.8cm h=9cm​

Answer 1

Solution

volume of cylinder

$= \pi \: r {}^{2} h \\ = \frac{22}{7} \times (1.4) {}^{2} \times 9 \: cm {}^{3} \\ = 55.44 \: cm {}^{3}$

Answer 2

Answer:

vol. of cylinder= pier^2h

=22/7×1.4×1.4×9

=22/7×14/10×14/10×9

=22×2/10×14/10×9

=22×5×7/5×9

=22×7×9

=154×9

= 1386 cm^3