ICSE Class 9 Answered
The number of radiations given out by a certain sample of radio-active substance is halved in 3 years. Find in how many years will the number of radiations emitted by the same sample of radio-active substance be one-eight at the same rate.
Asked by Topperlearning User | 31 Jul, 2017, 01:36: PM
Expert Answer
Let Principal be y and rate = r%
According to 1st condition
Amount in 3 years =
According to 2nd condition
Let after n years amount will be
Answered by | 31 Jul, 2017, 03:36: PM
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