# Posts by saila

Total # Posts: 2

**maths**

1. a first train travelling at x km an hour takes t hour less to travel y km than a slower one takes to travel z km . find the different between their speed 2. a man has one kind of coffee at 'a' paise per kg and another at 'b' paise per kg how much of each ...

**physics**

what is "sqrt" please can i know?????

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