refer the about picture
and answer the question
Answers
answers is
first take a scale and draw a AB =6cm line ok and then draw a AC =9cm line and then take a compass and measure the actual angle it will Lb=it will come 110⁰ ok
Just you have to draw angle ∆ABC with scale and then measure the angle ok
Answer:
In the question a figure is given so we could solve it by using the figure.
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As given in the figure: - height of cone ➛5ft.
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Height of cylinder ➛10ft
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Radius of cone and also cylinder ➛ 5ft
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According to the figure- There are two cones and one cylinder and we have to find grain kilo volume.
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Therefore,
Total volume of grain silo = Volume of cylinder + 2(Volume of cone)
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Now we use that formula
\bf\red{Volume \: of \: Cylinder \: = \pi {r}^{2} h}VolumeofCylinder=πr2h
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\bf\red{Volume \: of \: Cone = \frac{1}{3}\pi {r}^{2} h }VolumeofCone=31πr2h
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Here,h= height =radius.
Now by putting the formula
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Total volume of grain silo= Volume of cylinder + 2 (Volume of cones)
\bf{volume \: of \: grain \: silo \: = \: \pi {r}^{2} + 2( \frac{1}{3}\pi {r}^{2}h ) }volumeofgrainsilo=πr2+2(31πr2h)
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⇒From the figure put the value of n and r.
\bf{➣ \: \pi \times ( {5}^{2}) \times 10 \: + 2( \frac{1}{3 } \times \pi \times ( {5}^{2}) \times 5) }➣π×(52)×10+2(31×π×(52)×5)
Taking π common
\bf{➩\pi[25 \times 10 + \frac{2 \times 125}{3} ]}➩π[25×10+32×125]
\bf{➩\pi[\frac{250 \times3 + 250}{3} ]}➩π[3250×3+250]\bf{➩\pi[\frac{750+ 250}{3} ]}➩π[3750+250]\bf{➩\pi[\frac{1000}{3} ]}➩π[31000]\bf{➩ \frac{22}{7} [\frac{1000}{3} ]}➩722[31000]➼\bf\green{ \: 1047.2}➼1047.2So, the correct answer is “Option D”.
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Note: We use the following formula to find the total volume of the grain as the figure consist of 2 cones and a cylinder Volume of cone=πr^2h.
\bf{Volume \: of \: Cone = \frac{1}{3}\pi {r}^{2} h }VolumeofCone=31πr2h