Direction for: In each of the following questions a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements mark the correct answer as
Assertion: in taking into account the fact that any object which floats must have an average density less than that of water, during world war I, a number of cargo vessels are made of concrete. Reason: Concrete cargo vessels were filled with air.A) If both Assertion and Reason are true and the Reason is the correct explanation of the Assertion
B) If both Assertion and Reason are true but the Reason is not the correct explanation of the Assertion
C) If Assertion is true but Reason is false
D) If both Assertion and Reason are false
Correct Answer: A
Solution :
The density of concrete of course, is more than that of water and a block of concrete will sink like a stone, if dropped into water. Concrete cargo were filled with air and as such, average density of cargo vessels \[{{T}_{1}}>{{T}_{2}}\] It follows that the average density of cargo vessels must be less than that of water. As a result the concrete cargo vessels did not sink.
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