.(a) The whole surface area of a solid right
circular cylinder of diameter 7 cm is 385
sq. cm. Find its volume.
Answers
Answer:
Given data is as follows:
(i) For tin can with rectangular base:
Length = 5 cm
Width = 4 cm
Height = 10 cm
(ii) For plastic cylinder with circular base
Diameter = 7 cm
Height = 10 cm
We have to find out which container has greater capacity and also the difference in their capacities.
(i) Volume of tin can =
=
=200
(ii) Volume of cylinder =
Diameter is given as 7cm. Therefore, r =
Volume of cylinder =
= 385 cm3
From the above it can be concluded that plastic cylinder has greater capacity.
Difference in their capacities = 385 – 200 = 185 cm3
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