JEE Main 2021 Physics question

A radioactive material decays by simultaneous emissions of two particles with half lives 1400 years and 700 years respectively. What will be the time after which one third of the material remains ? (Take ln 3 = 1.1)

• (A)1110 years
• (B)700 years
• (C)340 year
• (D)740 yearCorrect