Question

5. Mr. Rathor invested two-thirds of his money at 6% S.I. and remaining portion at 5-%S.L. If the total investment
was Rs. 45,000, how much did he earn after 3 years?
​

Answer 1

Given :-

• Mr. Rathor invested (2/3) of his money at = 6% S.I.
• Remaining portion at 5% S.I.
• Total investment = Rs.45,000 .

To Find :-

• How much did he earn after 3 years ?

Solution :-

Case 1) :-

• Principal = (2/3) of 45000 = Rs.30000
• Rate = 6% .
• Time = 3 years.

we know that,

• SI = (P * R * T)/100

putting values we get,

→ SI = (30000 * 6 * 3)/100

→ SI = Rs.5400.

Case 2) :-

• Principal = (1/3) of 45000 = Rs.15000
• Rate = 5% .
• Time = 3 years.

so,

→ SI = (15000 * 5 * 3)/100

→ SI = Rs.2250 .

therefore,

→ Mr. Rathor earn from both investment = 5400 + 2250 = Rs.7650 (Ans.)

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