Simple Interest Practice Test 2

Question : 27 of 40

Marks: +1, -0

The simple interest on an amount at the rate of interest of 6% for 9 months is Rs 161 less than the simple interest on the same amount at the rate of interest of 7% for 11 months. What is the principal?

Rs 1,800
Rs 8,400
Rs 8,000
Rs 8,200
Rs 7,500

Validate

Solution:

Let the principal = Rs P.

∴{P×7×1}/{100×12}-{P×6×9}/{100×12}=161

77P - 54P = 161 × 1,200

23P = 161 × 1,200

P = 8,400

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