In what time will Rs 24000 amount to Rs 30000 at 10% p. a.?​

2.5 years

Step-by-step explanation:

Given data

Principal= Rs 24000

Final amount A= Rs 30000

Rate r= 10%

The simple interest expression is

A=P(1+rt)

substitute

30000=24000(1+0.1*r)

30000=24000+2400t

30000-24000=2400t

6000=2400t

t= 6000/2400

t=2.5

Hence the time is 2.5 years

introduction, methodology, results, discussion

step-by-step explanation:

an observational study is one which consists of actual observation to record data and then analyse the data.

there are a number of factors that should be analyzed before starting an observational study.

the main four factors are:

i) introduction:   this should be analysed to check whether the purpose of the study is correctly established and the data recorded are appropriate for the study

methodology:   the method of collecting the data, such as whether randomly selected, and whether sample size matches with the population to be studied, whether questions asked are easy to answer by common men, etc.

results: then results such as summary of data with comments should be studied thoroughly

discussion:   the last is the discussion, this can be either by management people or persons who are all interested , etc.

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have