Question

the time taken by plane to cover 150km was 21/2hour more than the time taken in return jrney, if he returned at a speed of 10km/hr more than the speed while goinh​

Answer 1

HeYa❤️...

Answer:

Let the speed while going be x km/h.

Speed while returning = (x+10) km/h

According to question,

$\frac{150}{x} - \frac{150}{x + 10} = \frac{5}{2} \\ \\ x {}^{2} + 10x - 60 = 0 \\ \\ (x + 30)(x - 20) \\ \\ x = 2 \: or \: x = - 30$

Speed while going = 20 km/h and speed while returning= 20+ 10= 30 km/h.

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Answer 2

Hey Mate this is your answer hope it helps