Question

If log a/3 = log b/4 = log c/5, then ca equals
(a) 2b (b) b² (c) 8b (d) 4b

Answer 1

Answer:

let log a/3 = log b/4 = log c/5 = x

so, a= 3× 10^x, b = 4×10^x, c= 5 × 10^x

so, ca = 5× 10^x × 3× 10^x

= 15 × (10^x)^2

so answer is option is b