Question

1) In how many year will Rs 800 amount to Rs 1200 at 5% per annum.

2) The solution of the equation ax -b =0 is

3) length of tape required to cover the edged of a semicircle disc of radius 14m = ______ ​

Answer 1

1)1) In how many year will Rs 800 amount to Rs 1200 at 5% per

Description for Correct answer:

Principal = Rs. 1200; A = Rs.1323; R = 5%; N = ?

1323=1200(1+5100)2

13231200=(105100)n

(441400)=(2120)n

(2120)n=(2120)2

Number of years = 2 annum.

2) Hence in this case the given system of equations must possess a non-zero solution. The number of solutions of the equa- tion AX=0 will be infinite.

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3)