Question

1) A heap of wheat is in the form of a cone whose diameter is 10.5m and
height is 3m. Find its volume. If 1m3 wheat cost is Rs.10. then find the total cost
of wheat
2) The diameter of a cylindrical vessel is 10 cm height is 7cm then the curved
surface area of a cylindrical vessel is _____________.
a) 220cm^2
b) 110 cm^2
c) 440 cm^2
d) 550 cm^2

Answer 1

Step-by-step explanation:

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Answer :Given:

⇒Diameter =10.5 m

⇒radius =r =5.25 m

⇒height =3 m

⇒volume =

3

1

πr

2

h

⇒Volume=(

3

1

×

7

22

×5.25×5.25×3) m

3

⇒Volume=86.625m

3

For slant height:

⇒l

2

=h

2

+r

2

=3

2

+(5.25)

2

=9+27.5625=36.5625

⇒6.0467 m(approx)

Canvas needed to protect wheat from rain

Therefore, curved surface area=πrl

=(227×5.25×6.0467) m

2

=99.77 m

2

(approx)