Q.Two partners invest $4000$ rupees and $6000$ rupees for the same period, and the profit is $2500$ rupees. The first partner's share is:

Equal times mean the profit is split in the ratio of the capitals, $4000:6000$.

Both capitals are invested for the same period, so this is a simple partnership and profit is shared in the ratio of the capitals.

Capital ratio. $4000 : 6000 = 2 : 3 \quad (\text{dividing both by } 2000),$ giving a total of $2 + 3 = 5$ parts.

First partner's share. $\frac{2}{5} \times 2500 = 1000 \text{ rupees}.$ …

The trap is choosing option (c) $1500$ rupees — that is the second partner's share. Always match the ratio term to the right partner: the partner with the smaller …