Question

in how much time wil a certain sum 1.5 times the principal at 10% per annum. ​

Answer 1

Answer:

ANSWER

Given, P= Rs. 6000, Amount = Rs. 7200, Time =4 years

S.I. =A−P= Rs. 7200− Rs. 6000

S.I = Rs. 1200

∴ Rate =(

6000×4

1200×100

)%p.a.=5%p.a.

New rate =1.5×5=7.5%p.a.

∴ Required amount = Rs. 6000+ Rs.

100

6000×7.5×5

= Rs. 6000+ Rs. 2250

= Rs. 8250

and please follow me

Answer 2

Answer:

Let Principal be ₹ 100

Amount = ₹ 150

Interest = Amount - Principal

= 150 - 100

= ₹ 50

$time \: = \frac{si \times 1 00 }{p \times r} = \frac{50 \times 100}{100 \times 10} = 5$

so rate of interest is 5 % per annum.