Question

A quantity m varies jointly with p and r. If m is 1, p is 2, and r is 4. What is the constant of variation?

1/8
1/2
2
8

Answer 1

A) 1/8

Explanation:

Given:

A quantity "m" varies jointly with "p" and "r".

Now we have to form the equation.

m = kpr, where "k" is the constant.

Now we have to plug in the given values; m =1, p = 2 and r = 4 and find the value of k.

1 = k.2.4

1 = 8k

Divide both sides by 8, we get

8k/8 = 1/8

k = 1/8.