An author received Taka 0.80 in royalties for each of the first 100,000 copies of his book sold, and Taka 0.60 in royalties for each additional copy sold. If he received a total of Taka 260,000 in royalties, how many copies of his book were sold?
Created: 6 years ago |
Updated: 2 years ago
best des
Let the number of copies sold be X.
Then, 100000×0.8 + (X - 100000)×0.6 = 260000
or, 80000 + 0.6X - 60000 = 260000
or, 0.6X = 260000 - 80000 + 60000
or, 0.6X = 240000
or, X = 240000/0.6 = 400000 copies
Md Azizur Rahman
Founder of Satt
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