Navigate

If 20% of a radiactive element decays in 10 days, then amount of original material left

If 20% of a radiactive element decays in 10 days, then amount of original material left after 30 days is (approx)

Options

(a) 78%
(b) 62%
(c) 51%
(d) 48%

Correct Answer:

51%

Explanation:

No explanation available. Be the first to write the explanation for this question by commenting below.

UP2015
admin:

Related Questions

  1. Which of the following is suitable for the fusion process?
  2. Two waves are represented by the equations y₁ = a sin (?t + kx + 0.57) m
  3. A transformer of 100% efficiency has 200 turns in the primary coil and 40000 turns
  4. A disc of mass 100 g is kept floating horizontally in air by firing bullets
  5. Two points are located at a distance of 10 m and 15 m from the source of oscillation