Banner 0
Banner 1
Banner 2
Banner 3
Banner 4
Banner 5
Banner 6
Banner 7
Banner 8
Banner 9

Q.

The mean lives of a radioactive sample are 30 years and 60 years for α-emission and β- emission respectively. If the sample decays both by α-emission and  β-emissionsimultaneously, the time after which, only one-fourth of the sample remain is

see full answer

High-Paying Jobs That Even AI Can’t Replace — Through JEE/NEET

🎯 Hear from the experts why preparing for JEE/NEET today sets you up for future-proof, high-income careers tomorrow.
An Intiative by Sri Chaitanya

a

32.45 years

b

20 years

c

27.72 years

d

45 years

answer is C.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

JEE

NEET

NEET

Foundation JEE

Foundation JEE

Foundation NEET

Foundation NEET

CBSE

CBSE

Detailed Solution

λe=130+160=120 Now N=N0e-λet =N04=N0e-t20        ⇒t=27.72 yrs
Watch 3-min video & get full concept clarity

courses

No courses found

score_test_img

Get Expert Academic Guidance – Connect with a Counselor Today!

whats app icon