What sum of money must be given as simple interest for six months at 4% per annu

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What sum of money must be given as simple interest for six months at 4% per annum in order to earn Rs.150 interest?

Options:

A . Rs.7500

B . Rs.5000

C . Rs.15000

D . Rs.10000

Answer: Option A
Answer: (a)Using Rule 1Simple Interest (S.I.)= ${\text"Principal × Rate × Time"/100$ orS.I. = ${\text"P × R × T"/100$P = ${\text"S.I." × 100}/\text"R × T"$, R = ${\text"S.I." × 100}/\text"P × T"$, T = ${\text"S.I." × 100}/\text"P × R"$ A = P + S.I. or S.I. = A - P

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