"Question 1 Given a cylindrical tank, in which situation will you find surface area and in which situation volume. (a) To find how much it can hold (b) Number of cement bags required to plaster it (c) To find the number of smaller tanks that can be filled with water from it.
Class 8 Mensuration Page 191"
Answers
Mensuration:
Mensuration is the branch of mathematics which concerns itself with the measurement of Lengths, areas & volume of different geometrical shapes or figures.
Area: the area of the plane figure is the surface enclose by its boundary.
A square centimetre (cm²) is generally taken at the standard unit of an area. We use square metre (m²) also for the units of area.
Volume:
The volume of a solid figure is a space occupied by it.
Volume is measured in cubic units. The common units of volume and a corresponding units of length cubic millimetre (mm³), cubic centimetre (cm³), cubic metre (m³).
The Litre (L) is a unit commonly used for measuring the capacity of vessels or the volume of a liquid.
1 L = 1dm³=1000cm³
1 ml= 1 cm³
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Solution:
(a) To find how much it can hold We need to find the volume or capacity.
(b) Number of cement bags required to plaster it.
To plaster the surface we need to find the surface area .
(c) To find the number of smaller tanks that can be filled with water from it.
we have to find the Volume or capacity .
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Hope this will help you....
Answer:
Solution 1:
Given a cylindrical tank, in which situation will you find surface area and in which situation volume.
(a) Volume
(b) Volume
(c) Volume