Use a comma when you have nouns of ____________.
This, That, These, ThoseComparative AdjectiveNoun Clause
Next quiz: Aptitude : Problems on Trains
Two trains 140 m and 160 m long run at the speed of 60 km/hr and 40 km/hr respectively in opposite directions on parallel tracks. The time (in seconds) which they take to cross each other, is:
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