Several deposits with known amounts or links, total SI given: unknown rate, time or sum
This type of question, asked 8 times: 14 Jul 2023 S2, 17 Jul 2023 S1, 9 Sep 2024 S3, 19 Sep 2024 S1, 24 Sep 2024 S3, 12 Sep 2025 S3, 17 Sep 2025 S1, 19 Sep 2025 S2. All 8 questions below, oldest first.
Try each one first, then open its answer.
Question 1
14 Jul 2023 S2
73If the simple interest at the same interest rate on ₹500 for 4 years and ₹700 for 2 years, combined together, is ₹280, then what is the rate of interest?Tap an option to check your answer.
Question 2
17 Jul 2023 S1
61A person deposited ₹500 for 3 years, ₹650 for 5 years, and ₹1,250 for 7 years. He received a total simple interest of ₹1,620. The rate of interest per annum is:Tap an option to check your answer.
Question 3
9 Sep 2024 S3
68Ramesh has ₹18,000. He deposited ₹7,000 in a bank at the rate of per annum and ₹6,000 in other bank at the rate of per annum simple interest. If he received ₹1,160 as simple interest at the end of one year, then the rate of interest per annum on rest of the capital is equal to:Tap an option to check your answer.
Question 4
19 Sep 2024 S1
69Aman invested a sum of money in scheme A at the rate of p.a. for a period of 5 years on simple interest. He invested four times of the sum of scheme A in scheme B at the rate of p.a. for 7 years on simple interest. He received a total interest amount of ₹1,620. How much (in ₹) did he invest in scheme B?Tap an option to check your answer.
Question 5
24 Sep 2024 S3
62Ramu lent ₹3,000 to Raju and a certain sum to Ravi at the same time and at the same rate of simple interest of 8% per annum. After 5 years, he received a sum of ₹1,600 from Raju and Ravi together as interest. Find the sum lent to Ravi.Tap an option to check your answer.
Question 6
12 Sep 2025 S3
70A lent Rs. 5000 to B for a duration of 2 years and Rs. 3000 to C for a period of 4 years both at the same simple interest rate. In total, he received Rs. 2200 as interest from both borrowers. What is the rate of interest per annum?Tap an option to check your answer.
Question 7
17 Sep 2025 S1
58Rs. 900 is lent at a certain rate of simple interest. After 9 months, another Rs. 600 is lent at a rate that is 1.5 times the original rate. If the total simple interest after 1 year is Rs. 72, find the original rate.Tap an option to check your answer.
Question 8
19 Sep 2025 S2
59A person invested ₹8,000 in one scheme at simple interest and ₹5,000 in another scheme at simple interest for the same duration. If he received a total interest of ₹1,760 from both investments, what was the duration (time period) of the investments?Tap an option to check your answer.