The profit sharing ratio of A and B, will also be 3 : 4.
Therefore, 3 / 4 = 2100 / B
B = Rs.2800
Profit sharing ratio will be just same as Capital ratio i.e. 3 : 4.
3 x = 2100
x = 700
4x = 4(700) = 2800
Profit should also be shared in the ratio of 3:4
Therefore, profit of B will be Rs.2800
But the question is saying about total annual profit,
Rs.2100 + Rs.2800 = Rs.4900.
Profit of B will be Rs.2800.
But here they are asking about total Profit,
So, 2100 + 2800 = Rs.4900