Simple Interest

⇒ Amount = simple interest + principal
⇒ 9200 = simple interest + 8000
⇒ simple interest = 9200 - 8000
⇒ = ₹ 1200
⇒ if r % be the rate of interest ,
⇒ Then from, simple interest = ((principal × rate% × time)/100)
⇒ 1200 = ((8000 × r × 3)/100)
⇒ r = 5%
⇒ 2% more interest that is 7% interest
⇒ simple interest = ((8000 × 7 × 3)/100)
⇒ = ₹ 1680
⇒ thus amount he will get is ₹ 8000 + ₹ 1680 = ₹ 9680
Hence, option B is correct.

Let first part = ₹×
Second part = ₹ (1750 - x)
we know that,
⇒x × (8/100) = (1750 - x) × (6/100)
⇒ 8x+6x = 1750 × 6
⇒ 14x = 1750 ×6
⇒ x = ((1750 × 6)/14)
⇒ x = 750
⇒ Interest = 8% of ₹ 750
-⇒ (8/100)×750
-⇒ ₹ 60
Hence the answer is : 60

Let rate = R% and time = R years.
Simple Interest, SI = (p × n × r) / 100
Then, ( 1200×R×R / 100 ) = 432
⇒ 12 × R^2 = 432
⇒ R^2 = 36
⇒ R = 6

Given principal, p = 700 ₹,
rate of interest r= 6%,
time, t=4 years
Simple interest, SI = (p×r×t)/100
⇒ SI = (700×6×4)/100
⇒SI = 168
⇒ At the end of 4 years, interest earned is ₹ 168

Given
Simple interest = ₹ 4016.25 , Rate = 9 p.c.p.a. N= 5 years.
We know that, Simple interest, SI = (p×r×t) / 100
⇒ Principal = S.I × 100 / (r × t)
= ₹ ( 100 × 4016.25 / 9 × 5)
= ₹ ( 401625 / 45 )
= ₹ 8925
Sum =₹ 8925:

S.I. for 1 year = ₹ (854 - 815) = ₹ 39. S.I. for 3 years = ₹(39×3) = ₹ 117. Therefore , Principal = ₹ (815 - 117) = ₹ 698.

Principal, p = 200 ₹,
Rate of interest, r = 3 ($$\frac{1}{2}$$) % = 7/2%
Time, t= 4 years
Simple Interest, S.I = ( p×t×r) / 100
⇒ S.I = (200×7×4) / (2×100)
= 10×7×4
= 28
Amount to be paid = Principal + S.I = 200 + 280= 228

Given: P = ₹ 750;Amount = ₹ 900
Amount = P + S.I
SI = Amount – P
SI = 900 – 750 = ₹150
SI = PNR/100
150 = (750×Nx 8)/100
N= (150×100) / (750×8)
N = 100 / (5×8)
N = 100 / 40
N = 2.5 years
∴ time taken will be 2 years 6 months:

Solution is
GivenPrincipal : 7200
Rate of interest : 5
Number of months : 9
Simple Interest for 1 year = (7200×1×5) / 100
Simple Interest for 1 year = 360
Simple interest is calculated for years,but given time period is in month son = 9 / 12
Simple interest for 9 months = (9/12)×SI =($$\frac{3}{4}$$)x 360
Simple Interest for 9 months = 270
Answer is270

Principal : 1400
Rate of interest : 10
Number of years : 4
Simple Interest = pnr/100
Simple Interest = (1400×4×10) / 100
Simple Interest = 560