Topics

# A sum of money becomes 3 times in 5 years at simple interest. In how many year will the same sum become 6 times at the same rate of simple interest? (

 A) 10 years B) 12 years C) 12.5 years D) 10.5 years

 C) 12.5 years

According to question

$$\Large 2P = \frac{P \times 2 \times 5}{100}$$

R = 40%

At the same rate and Now, same sum becomes 6 times in t years

$$\Large 5p = \frac{P \times 40 \times t}{100}$$

$$\Large t = \frac{500}{40} Years$$

$$\Large t = \frac{25}{2} Years$$

t = 12.5 Years

Option (C)is correct.

Part of solved CDS Maths(1) questions and answers : Exams >> CDSE >> CDS Maths(1)

Similar Questions
1). A man buys 200 oranges for Rs.1,000. How many oranges for Rs.100 can he sell to that his profit percentage is 25%?
 A). 10 B). 14 C). 16 D). 20
2). If m% of m + n =2% of (m X n), then what percentage of m is n ?
 A). 50% B). 75% C). 100% D). Cannot be determined due to insufficient data
3). If the side of a cube is increased by 100% then by what percentage is the surface area of the cube increased?
 A). 150% B). 200% C). 300% D). 400%
4). How many pairs. M p positive integers $$m$$ and $$n$$ satisfy the equation $$\Large \frac{1}{m}$$+$$\Large \frac{4}{n}$$= $$\Large \frac{1}{12}$$
Where $$n$$ is an odd integer less than 60?
 A). 7 B). 5 C). 4 D). 3
5). The sides of a triangle are in the ratio $$\Large \frac{1}{2}$$ : $$\Large \frac{1}{3}$$ : $$\Large \frac{1}{4}$$ If its perimeter is 52 cm, then what is the length of the smallest side?
 A). 9 cm B). 10 cm C). 11 cm D). 12 cm

6). The diameter of a metallic sphere is 6 cm. The sphere is melted and drawn into a wire of uniform circular cross-section. If the length of the wire is 36 m, then what is its radius equal to ?
 A). 0.1 cm B). 0.01 cm C). 0.001 cm D). 1.0 cm
 A). $$\sqrt{3}$$ B). 2 C). 4 D). 8
9). If $$a_{n}= 3 - 4n$$, then what is $$a_{1} + a_{2} + a_{3} + ...... + a_{n}$$ equal to $$[ 1 + 2 + 3 + ..... + n = \frac{n(n + 1)}{2}]$$
 A). -n(4n-3) B). -n(2n-1) C). -$$n^{2}$$ D). -n(2n-1)