B. 2, just keep halting it hope it helped
1.5, 2.25, 3.375, 5.0625, 7.59375... and so on
Their ages are 24 years old each.
A + b = 15 ..... eq 1
a – b = 12 ...... eq 2
So a = 15 – b
Substitute in eq 2 :
15 – b – b = 12
15 – 2b = 12
–2b = 12 – 15
b = 1.5
So a = 15 – 3/2 = 13.5
4ab = 4 x 13.5 x 1.5 = 81
