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. Two solid discs of radii r and 2r roll from the top of an inclined plane
  2. A stone of mass 1kg is tied to a string 4m long and is rotated at constant speed
  3. A layer of glycerine of thickness 1 mm present between a large surface area of 0.1 m².
  4. The young’s modulus of steel is twice that of brass. Two wires of same length
  5. Source S₁ is producing, 10¹⁵ photons per second of wavelength 5000Å