Correct option is (B) ₹1960
\(\because\) The cost of 20 m of cloth = Rs 1600
\(\therefore\) The cost of 24.5 m of cloth \(=Rs\,(\frac{1600}{20}\times24.5)\)
\(=Rs\,(80\times24.5)\)
= Rs 1960
यदि रेडियोएकत्व रत्रोत की प्रारंभिक गणना दर `N_0` है, तब N अर्द्ध-आयुओ के पश्चात् गणना दर होगी ।
`N=M_0(1/2)^n`
`100=1600(1/2)^n`
`:." "n=4`
यदि स्रोत की अर्द्ध-आयु T है, तब
4...
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