Question

Please help me to do this

Answer 1

A =P+SI

$si = \frac{prt}{100} \\ si = \frac{2500 \times 12 \times 7}{200} \\ si = 1050$
A=2500+1050
A=3550




4000-3550 = 450


HE NEEDS Rs. 450


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Answer 2

Answer:

Mr Kannan still needs ₹450

Step-by-step explanation:

Since the question doesn't mentioning compounding, we should presume that simple interest is appropriate here.

This just means that for each year, the interest received will be 12% of the ₹2500 principal.  So the interest for each year is

12% of ₹2500 = 0.12 × ₹2500 = ₹300.

As the investment is for 3.5 years, the total amount of interest received is

3.5 × ₹300 = ₹1050.

So in total, Mr Kannan now has

₹2500 + ₹1050 = ₹3550.

Since he needs ₹4000 for the table, the extra money he still needs is

₹4000 - ₹3550 = ₹450