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Important Time Saving Short Trick / Shortcut For JEE Main 2019 Maths

Important Time Saving Short Trick / Shortcut For JEE Main 2019 Maths | Part 2

Important Time Saving Short Trick / Shortcut For JEE Main 2019 Maths | Part - 4

While pushing a heavy box from one place to another in his house, Naresh noticed that it was difficult to take a stationary box from its resting position to moving position but it was easy to move that box with that speed. Why was it so?

A car travels for 11 hours. For the first 100km the car travels with a certain speed, and then it increases its speed by 15 km h to cover the remaining 280 km. The time (in hours) it takes to travel the 100 km part is :