Question

Please answer the question fast

Answer 1

which one...............

Answer 2

Hi there !
Here's the answer:

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¶ shape of pole = Cylinder
• Its base is circle

¶ radius r = $\frac{diameter}{2}$

¶ Volume\of cylinder = $Πr^{2}h$


¶ 1 m = 100 cm
=> 1 cm = 0.01 m


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SOLUTION:

Given,

Height = h = 7 m
diameter = d = 20 cm

=>$r = \frac{20}{2} = 10\: cm$

convert to m

=> $r =10×0.01 m = 0.1\: m$

Volume = $Πr^{2}h =\frac{22}{7} × 0.1 × 0.1 × 7 = 0.22\: m^{3}$


Now,
Given,

weight of $1\: m^{3}$ wood = 225 kg

weight of $0.022\: m^{3}$ wood = 225 × 0.22 = 49.5 kg


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Hope it helps