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The sum required to earn a monthly interest of Rs 1200 at 18% per annum SI is

  • a)
    Rs. 50000

  • b)
    Rs. 60000

  • c)
    Rs. 80000

  • d)
    none of these

Correct answer is option 'C'. Can you explain this answer?
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The sum required to earn a monthly interest of Rs 1200 at 18% per annu...


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The sum required to earn a monthly interest of Rs 1200 at 18% per annu...
Given,
Interest = Rs 1200
Rate = 18% per annum
We need to find the sum required to earn this interest.

Formula used: Simple Interest = (P * R * T)/100

where,
P = principal amount
R = rate of interest per annum
T = time period in years

Let's solve the problem step by step.

Step 1: Find the SI for one month
We know that the interest is to be earned monthly. So, we need to find the SI for one month.

SI = (P * R * T)/100
Here, T = 1/12 years (since we need to find the SI for one month)

SI = (P * 18 * 1/12)/100
SI = P/67

Step 2: Equate SI to the given interest
We know that the SI earned in one month should be equal to Rs 1200.

P/67 = 1200
P = 1200 * 67
P = Rs 80,400

Therefore, the sum required to earn a monthly interest of Rs 1200 at 18% per annum SI is Rs. 80,400.
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Community Answer
The sum required to earn a monthly interest of Rs 1200 at 18% per annu...
Answer is (D) None of the above Answer cannot be (C) because annual interest on 80,000 is 80000×12/100 = 9,600 Therefore, monthly interest is 9,600 /12 = 800
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The sum required to earn a monthly interest of Rs 1200 at 18% per annum SI isa)Rs. 50000b)Rs. 60000c)Rs. 80000d)none of theseCorrect answer is option 'C'. Can you explain this answer?
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