Question

E varies directly with the square root of C. If E=40 when C=25 find: E when C= 49

Answer 1

Explanation:

Answer 2

Answer: E = 56

Explanation:

E is proportional to √C

To remove proportionality, introduce a constant (k).

E = k × √C

From question,

E = 40 and C = 25

So,

40 = k ×√25

40 = k × 5

k = 8

Now,

C = 49

k = 8

E = ?

E = k√C

E = 8 × √49

E = 8 × 7

E = 56