Rajinder bought one almirah for Rs. 4800 and the other and the other for Rs. 3640 . He sold the first almirah at a gain 13 1/3 % and the other at a loss of 15% . How much did he gain or lose in the whole deal .

In the first triangle 80+20+p=180 (since sum of all angles of a triangle is 180)so p= 80also in second triangle 55+45+q=180 (since sum of all angles of a triangle is 180)so q=80so we can conclude that p=80 degrees q=80 degrees so p=q=80 degreeshence option b is correct