Time = 2 yr 3 months = 2¹/₄ yr = 9/4 yr
∴ SI = [5800 x (17/2) x (9/4)] / 100

Correct Option: B

Time = 2 yr 3 months = 2¹/₄ yr = 9/4 yr
∴ SI = [5800 x (17/2) x (9/4)] / 100
= 8874/8
= ₹ 1109.25
= ₹ 1109

Here, n = 3, m = 6, R₁ = 4%
∴ R₂ = [(m - 1)/(n - 1)] x R₁

Correct Option: A

Here, n = 3, m = 6, R₁ = 4%
∴ R₂ = [(m - 1)/(n - 1)] x R₁
= [(6 - 1)/(3 - 1)] x 4
=(5/2) x 4
= 10%

Here, P = ₹ 65800, R = 14% T = 4 yr
Hence, SI = (65800 x 14 x 4) / 100 =₹ 36848

Correct Option: A

Here, P = ₹ 65800, R = 14% T = 4 yr
Hence, SI = (65800 x 14 x 4) / 100 =₹ 36848

∴ Required amount = P + SI
= 65800 + 36848
= ₹ 102648

Let the sum be p
Then, for R = 5%
SI = (4p - p) = 3p
∴ 3p = (P x 5 x T)/100 = PT/20
⇒ T = 60 yr

Again, for another rate (R)
SI = (8P - P) = 7P
∴ 7P = (P x R x 60)/100

Correct Option: C

Let the sum be p
Then, for R = 5%
SI = (4p - p) = 3p
∴ 3p = (P x 5 x T)/100 = PT/20
⇒ T = 60 yr

Again, for another rate (R)
SI = (8P - P) = 7P
∴ 7P = (P x R x 60)/100
⇒ R = (7 x 100)/60 = 35/3%
= 11²/₃ %

Here, n = 4, R = 10, T = ?
According to the formula,
R = 100 (n - 1)/T

Correct Option: B

Here, n = 4, R = 10, T = ?
According to the formula,
R = 100 (n - 1)/T
⇒ 10 = [100(4 - 1)]/T = (100 x 3)/T
∴ T = 30 yr