Ultra noob Qn

[brussel sprout]

I just got the year 12 textbook from a friend (Cambridge), and I'm already stuck on chapter 2. I want to try get a headstart for next year.

Chapter 2, Ex 2A, Question 3:
An aircraft, used for firespotting, flies from its base to locate a fire at an unknown distance, km away. It travels straight to the fire and back, averaging 240km/h for the outward trip and 320km/h for the return trip. If the plane was away for 38 minutes, find the distance, km.

[TrueTears]

distance = speed x time.

Let first half of trip be a km

and second half be b km.





But

So ...[1]

Also hours. ...[2]

Solve simultaneously.

[brussel sprout]

Oh ok, thanks alot! For questions like this, would we be expected to do it without a calculator?

[TrueTears]

Oh ok, thanks alot! For questions like this, would we be expected to do it without a calculator?

Yeah good practise for arithmetic etc.

[wombifat]

It's good practice, but generally the only questions you'll need to do without a calculator will be pretty straightforward