Given that,
P = 705600, R = 5% and n = 2

According to the formula,
Population after n yr = p(1 + R/100)ⁿ

Correct Option: A

Given that,
P = 705600, R = 5% and n = 2

According to the formula,
Population after n yr = p(1 + R/100)ⁿ

∴ Population after 2 yr.
= 705600 x (1+ 5/100)²
= 705600 x (105/100)²
= 705600 x (21/20 x 21/20) = 777924

Given, R = 15% and R₂ = 20%
Required population
= P(1 + R₁/100) (1 - R₂/100)

Correct Option: C

Given, R = 15% and R₂ = 20%
Required population
= P(1 + R₁/100) (1 - R₂/100)
= 126800(1 + 15/100) (1- 20/100)
= 126800 (1 + 3/20 ) (1- 1/5)
= 126800 x (23/20) x (4/5) = 116656

Let a man have = ₹ N.
Remainder money, after losses 20% of his money
= N - 20% of N

Remainder money, after spending 25% of his remainder money
= 4N/5 - 25% of (4N/5)

Correct Option: C

Let a man have = ₹ N.
Remainder money, after losses 20% of his money
= N - 20% of N
= N - (N x 20)/100
= (5N - N)/5
= 4N/5

Remainder money, after spending 25% of his remainder money
= 4N/5 - 25% of (4N/5)
= 4N/5 - (4N/5) x (25/100)
= 4N/5 - N/5
= (4N - N)/5
= 3N/5

According to the question,
3N/5 = 480
⇒ x = 480 x 5/3 = ₹ 800

Let kamal's marks be 100
∴ Shantanu's marks = 60
Kamal has 40 marks more than Shantanu
∴ Required percentage = (40/60) x 100%

Correct Option: D

Let kamal's marks be 100
∴ Shantanu's marks = 60
Kamal has 40 marks more than Shantanu
∴ Required percentage = (40/60) x 100%
= 66²/₃ %

Ans = 12 x (26/100) x (5/78) x (38/100) x (7/152) x 10000

Correct Option: B

Ans = 12 x (26/100) x (5/78) x (38/100) x (7/152) x 10000
= 12 x (5/3) x (7/4)
= 35