Question

4. At what rate per cent per annum will $400 yield
an interest of $78 in 1/2 years?​

Answer 1

Step-by-step explanation:

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Answer 2

principal = $400

SI = $78

Time = 3/2

rate = SI × 100/ P × T

=> 70×100/400×3/2

=> 7000/1200/2

=> 7000/600

=> 70/6

=> 11.67%

hence the required rate is 11.67% .