A clean, organized, and appealing image showing the concept of calculating simple interest. There shall be visible cues to suggest this, such as a stylized hand holding a pencil, poised over a sheet of graph paper where the outline of an equation with large '280', '5', and '3%' figures loom, hinting towards the elements of the question. The background can feature a gradient of soothing mute shades. A subtly incorporated hourglass could represent the time component. Please ensure the image has no written text.

Find the simple interest on N280 for 5 years at 3 %per annum show working

I need just the answer to my question

The simple interest on 280 for 5 years at 3% per annum is 42.

Here's the working:

i = Prt
i = 280 x 0.03 x 5
i = 42

What is the simple interest on 280 for 5 years at 3% per annum

If the interest rate is actually 15%, then the simple interest on 280 for 5 years would be:

i = Prt
i = 280 x 0.15 x 5
i = 168

So the simple interest would be 168 Naira.

no, you need to know how to do it.

i = Prt
so plug in your numbers.

20

168