Simple interest of ₹ Y for Z month at the rate of X% per annum is
(a) ₹ XYZ/1200
(b) ₹ XYZ/100
(c) ₹ 200
(d) ₹ XYZ/120
WBBSE
Class X
Mathematics
Simple Interest
01 Mark
2025
(a) ₹ XYZ/1200
Explanation:
Simple Interest formula:
SI = (P × R × T) / 100
where
- P = Y (Principal amount)
- R = X% (Rate of interest per annum)
- T = Z/12 years (since Z months = Z/12 years)
So,
SI = (Y × X × Z) / (100 × 12)
= (Y × X × Z) / 1200
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