SI on 1000 at 10% for T years =100T. SI on 800 at 10% for T years =80T. Difference: 100T−80T=20T=100, so T=5 years.
CUET UG 2023 — General Test Arithmetic
For a certain period, simple interest on Rs. 1000 at 10% per annum is Rs. 100 more than that on Rs. 800. Find the period (in years).
Held on 24 May 2023 · Verified 13 Jul 2026.
4
10
5
2
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