(6) 36 sq. cm (c) 25 sq. cm
(d) 45 sq. cm
19. Case Study Based-3
For a small cultural gathering in a village a pandal has to be formed. The vertical cross-section
parallel to the width side of the pandal is a rectangle of dimensions 7 m * 3 m mounted by a
semicircle of radius 3.5 m. The inner measurements of the cuboidal portion of the pandal are
10 m 7m3 m. Leaving the rectangular cross-section of the front, the rest of the pandal
is fully covered with cloth. Some questions are to be given here, answer them:
35 m
10 m
Answers
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Answer:
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Step-by-step explanation:
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Answered by
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Since the top of the building is in the form of half of the cylinder of radius 3.5m, and length 10m, split along the diameter
V= volume of the godown
V= Volume of the cuboid +
2
1
(Volume of the cylinder of radius 3.5m and length 10m)
=(l×b×h)+
2
1
(πr
2
h)
={10×7×3+
2
1
(
7
22
×3.5×3.5×10)}m
3
=(210+192.5)m
3
=402.5m
3
total surface area excluding the base floor
=Area of four walls +
2
1
Curved surface area of the cylinder + 2 area of the semi-circles
=[2(10+7)×3×
2
1
(
7
22
×3.5×3.5×10)+2(
7
22
×3.5×3.5)]m
2
=250.5m
2
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