RRB Group D 17-Dec-2018 Shift 1 Soled Paper

Question : 45 of 100

Marks: +1, -0

A sum of money, invested at 7.5% simple interest p.a. became ₹ 689 on maturity after 4 years. What was the original sum invested?

Solution:

P+SI= 689

P+{P×R×T}/{100}=689

P[1+{1×7.5×4}/{100}]=689

P[1+{30}/{100}]=689

P={689×100}/{130}=₹530

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