(o.0036)(2.8)(0.04)(0.1)(0.003)=?
A
840
B
84
C
8.4
D
0.84
Correct Answer: 840
b = a + c, b = 3 so a + c = 3 বা, a = 3 - c এখন, ab + bc = 3a + 3c = 3(3 - c) + 3c = 9 - 3c + 3c = 9