Learn English – Usage of “than that” and “than those”

grammar

I wish to to know the correct usage of "than" in the following sentences

[1]. The melting temperature of solvent A is comparatively lower than those/than that of other binary solvents involving B and C manufactured by the firm.

[2]. Usain Bolt ran his 100 m final race at London 2012 faster than in 100 m race at Rio 2016.

How to modify [2] such that the second "100 m race" does not appear.

Thank you—Suddhasattwa Ghosh, India

Best Answer

My first answer is the same as @Scu11y, and for the same reason. I also do not see that implication.

For the second case, I would actually edit it as:

[2]. Usain Bolt ran his 100 m final race at London 2012 faster than at Rio 2016.

or

[2]. Usain Bolt ran his 100 m final race at London 2012 faster than that at Rio 2016.

(where "that" refers to "his 100 m final race"; the first one without "that" is sufficient though, since the context is obvious here.)

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