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Mathematics
Simple Interest
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SSC CGL 2025 First Shift 📅 17 Sep, 2025

900 is lent at a certain rate of simple interest. After 9 months, another 600 is lent at a rate that is 1.5 times the original rate. If the total simple interest after 1 year is 72, find the original rate.

A
6.4%
B
4.5%
C
8.2%
D
5.6%
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SSC CGL
2025 • 17 Sep, 2025 • First Shift
900 is lent at a certain rate of simple interest. After 9 months, another 600 is lent at a rate that is 1.5 times the original rate. If the total simple interest after 1 year is 72, find the original rate.
Correct Answer
6.4%
900*(R/100)*1 + 600*(1.5R/100)*(3/12) = 72 => 9R + 2.25R = 72 => R = 72/11.25 = 6.4%.[span_57](start_span)[span_57](end_span)...
Ref/Book : 17 Sep S1 2025.pdf
Ref. Subject Mathematics
Chapter -
Ref. Topic Simple Interest
Pg. No -
💡 Analysis & Explanation
Introduction ▼
900*(R/100)*1 + 600*(1.5R/100)*(3/12) = 72 => 9R + 2.25R = 72 => R = 72/11.25 = 6.4%.[span_57](start_span)[span_57](end_span)
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