Question

Sonya and Isaac are in motorboats located at the center of a lake. At time t=0, Sonya begins traveling south at a speed of 36 mph. At the same time, Isaac takes off, heading east at a speed of 27mph. How fast is the distance between them changing after 12 minutes?

Answer 1

the speed btn sonya and issac would make a right angled trangle hence easy 2 solve through pythogoras

`{36}^(2) + {27}^(2) = 2025`

then find the

`\sqrt[?]{?}`

hence get 45

since it was 12 mins we need 2 multiply by 12

hence

`45 * 12 = 540`

Therefore it's 540mph