Practice Questions
Concept Explanation
When principal, rate, and simple interest are known, find time using the rearranged formula.
Key Formula
T = (100 × SI) / (P × R)
Example
P = Rs. 5,000, SI = Rs. 1,500, R = 10%. T = (100 × 1500)/(5000 × 10) = 3 years.
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Q1 Easy
P = Rs. 5,000, SI = Rs. 1,500, R = 10%. Time is:
ExplanationT = 150000/50000 = 3 years. -
Q2 Easy
P = Rs. 8,000, SI = Rs. 1,600, R = 5%. Time is:
ExplanationT = 160000/40000 = 4 years. -
Q3 Medium
P = Rs. 10,000, SI = Rs. 3,000, R = 6%. Time is:
ExplanationT = 300000/60000 = 5 years. -
Q4 Easy
P = Rs. 6,000, SI = Rs. 720, R = 4%. Time is:
ExplanationT = 72000/24000 = 3 years. -
Q5 Medium
P = Rs. 12,000, SI = Rs. 4,800, R = 8%. Time is:
ExplanationT = 480000/96000 = 5 years. -
Q6 Easy
P = Rs. 4,000, SI = Rs. 600, R = 5%. Time is:
ExplanationT = 60000/20000 = 3 years. -
Q7 Medium
P = Rs. 9,000, SI = Rs. 1,890, R = 7%. Time is:
ExplanationT = 189000/63000 = 3 years.
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Q8 Easy
P = Rs. 15,000, SI = Rs. 4,500, R = 10%. Time is:
ExplanationT = 450000/150000 = 3 years. -
Q9 Medium
P = Rs. 10,000, SI = Rs. 2,500, R = 5%. Time is:
ExplanationT = 250000/50000 = 5 years. -
Q10 Hard
P = Rs. 20,000, SI = Rs. 8,000, R = 10%. Time is:
ExplanationT = 800000/200000 = 4 years. -
Q11 Easy
P = Rs. 7,500, SI = Rs. 1,350, R = 6%. Time is:
ExplanationT = 135000/45000 = 3 years. -
Q12 Medium
P = Rs. 16,000, SI = Rs. 6,400, R = 8%. Time is:
ExplanationT = 640000/128000 = 5 years. -
Q13 Easy
P = Rs. 5,000, SI = Rs. 500, R = 2%. Time is:
ExplanationT = 50000/10000 = 5 years. -
Q14 Hard
P = Rs. 25,000, SI = Rs. 7,500, R = 12%. Time is:
ExplanationT = 750000/300000 = 2.5 years.
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DS1 Easy
What is the time period?
Statement IP = Rs. 5,000, SI = Rs. 1,500, R = 10%.
Statement IIRate is 10% per annum.
ExplanationStatement I alone gives T = 3 years. -
DS2 Easy
What is the time?
Statement IPrincipal is Rs. 8,000.
Statement IISI is Rs. 1,600 at 5% per annum.
ExplanationNeed P, SI and R together. T = 4 years.
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DS3 Medium
What is the time?
Statement ISI is Rs. 3,000.
Statement IIP = Rs. 10,000 and R = 6%.
ExplanationTogether: T = 5 years. -
DS4 Medium
Is the time greater than 4 years?
Statement IP = Rs. 12,000, SI = Rs. 4,800, R = 8%.
Statement IIRate is 8%.
ExplanationStatement I: T = 5 years, which is greater than 4 years.