Concept:
Interest on drawings is charged on amounts withdrawn for personal use.
Formula:
\[
\text{Interest} = \text{Amount} \times \text{Rate} \times \text{Time}
\]
Use average period method where timing is not exact.
Step 1: Shiv’s drawings.
Shiv withdrew ₹15,000 in the middle of each half-year.
That means:
Two drawings of ₹15,000 each
Mid-first half → 9 months
Mid-second half → 3 months
Total interest:
\[
(15{,}000 \times 6% \times \frac{9}{12}) + (15{,}000 \times 6% \times \frac{3}{12})
\]
\[
= 675 + 225 = 900
\]
\[
Shiv’s interest = ₹900
\]
Step 2: Ravi’s drawings.
₹20,000 withdrawn for personal insurance.
This is a personal expense paid by firm → treated as drawings.
Assume mid-year withdrawal (no timing given):
\[
\text{Interest} = 20{,}000 \times 6% \times \frac{6}{12}
= 600
\]
\[
Ravi’s interest = ₹600
\]
Step 3: Roshan’s drawings.
₹12,000 withdrawn from capital (personal use).
Timing not specified → assume mid-year.
\[
\text{Interest} = 12{,}000 \times 6% \times \frac{6}{12}
= 360
\]
\[
Roshan’s interest = ₹360
\]
Final Answer:
\[
\boxed{
\begin{aligned}
\text{Shiv} &= ₹900
\text{Ravi} &= ₹600
\text{Roshan} &= ₹360
\end{aligned}
}
\]