Question
A sum of money, when invested at an annual compound
interest rate of 'r%', amounts to Rs. 3,600 after 2 years and Rs. 4,320 after 3 years. Determine the value of 'r'.Solution
Let the sum invested be Rs. 'P'. ATQ; P X {1 + (r/100)}2Â = 3600 ....... (I) P X {1 + (r/100)}3Â = 4320 ....... (II) On dividing equation (II) by equation (I), we have; {1 + (r/100)} = 1.2 Or, 100 + r = 120 So, r = 20
If A : B = 8:5 and A is 21 more than B then find the sum of A and B.
Three numbers A, B and C are in the ratio of 10 : 12 : 17. If sum of these numbers is 429, ratio between the difference of B and A and the difference of...
The sum of three numbers is 147. If the ratio of the first to the second is 2:3 and that of second to the third is 5:8 then the second number is?Â
Marks scored by A and B in a test are in the ratio 13:5 respectively. If B had scored 5 more marks, then marks scored by A would be 30% more than that o...
Rs. 8,100 was supposed to be distributed among 'X', 'Y', and 'Z' in the ratio of (1/3) : (1/4) : (1/6), respectively. However, due to an error, it was a...
What is the ratio whose terms differ by 30 and the measure of which is 4/9?
What is the ratio whose terms differ by 52 and the measure of which is 3/5?
The ratio of zinc and copper in a brass pieces is 3:4. How much zinc will be there in 140 kg of such a piece?
Find the fourth proportion of (2k + 1), (4k + 2) and (6k + 3). (Note: 'k' is the smallest two-digit prime number.)
In an office, the ratio of the number of males to number of females is 11:7. If 2 males joined the class and 6 females left the class, then the ratio of...
Relevant for Exams:
