The compound interest Tk 2800 for $1\frac{1}{2}$ years at 10% per annum is-

To calculate the compound interest on Tk 2800 for 1 1/2 years at 10% per annum, we can use the following formula:

Compound interest = P[1 + (R/100)]^T - P

Where,

• P = Principal amount = Tk 2800
• R = Rate of interest = 10%
• T = Time in years = 1 1/2 = 1.5 years

Substituting the given values in the formula, we get:

Compound interest = 2800[1 + (10/100)]^1.5 - 2800

Compound interest = 2800 * [1.1]^1.5 - 2800

Compound interest = Tk. 434

Therefore, the compound interest on Tk 2800 for 1 1/2 years at 10% per annum is Tk. 434.

So the answer is 434