8th Class
Mathematics
Related to Competitive Exam
Question Bank
Arithmetic
question_answer
DIRECTIONS: Reade the following passage and answer the questions that follow. PASSAGE - 1 If \[=P{{\left( 1+\frac{R}{100} \right)}^{n}}\] is the value of an article at certain time which increases at the rate of \[=\frac{R}{{{\left( 1+\frac{R}{100} \right)}^{n}}}\]for first \[{{R}_{1}}%\]years and decreases at the rate of \[{{R}_{2}}%\] for next \[=P\left( 1+\frac{{{R}_{1}}}{100} \right)\times \left( 1+\frac{{{R}_{2}}}{100} \right).\] years, then the value of the article V at the end of \[=P{{\left( 1-\frac{R}{100} \right)}^{n}}.\] years is given by \[=\frac{P}{{{\left( 1-\frac{R}{100} \right)}^{n}}}\] Consider the following statements (i) If P be the population of a city and R be the growth rate, then. Population after n \[\frac{a}{b}=K\] (ii) If P is the population of a city and R be the decay rate, then population after n years \[{{a}_{1}}\] Which of the statements(s) given above is/are correct?