Question

Which of the following correctly describes the variation in the equation r=d/t?

1. r varies inversely with d and jointly with t
2. r varies jointly with t and d.
3. r varies inversely with t and jointly with d.
4. r varies directly with d and inversely with t.

Answer 1

Answer number 3 is correct.

Answer 2

Option 3rd is the right choice.

Explanation:

Which of the following correctly describes the variation in the equation r=d/t?

Option 3rd is correct - r varies inversely with t and jointly with d

Inversely related means if the value of one entity increases, the value of second decreases and vice versa.

Here, r = d*1/t

So, we can say r = 1/t, this means r is in an inverse relation to t and direct relation to d.

So, option 3rd is the correct choice.