SSC Government Jobs Exams Numerical Ability Algebra

If (a + b = 3), then what is the value of —

(a3 + b3 + 9ab) ?

(A) 18

(B) 27 (Ans)

(C) 81

(D) Cannot be determined due to insufficient data

Read Solution (Total 2)

a=1 b=2 then the answer is 27
9 years agoHelpfull: Yes(0) No(0)

cubing both sides
(a+b)3=(3)3
a3+b3+3ab(a+b)=27
a3+b3+9ab=27
9 years agoHelpfull: Yes(0) No(0)

SSC Other Question

The sides of a rectangle are in the ratio of 6 : 5 and its area is 1331 sq.m. Find the perimeter

of rectangle.

A.) 120 m B.) 121 Cm
C.) 121 m D.) None of these Which is the greatest out of the following ?

(i) 3√1.728

(ii) √3 - 1 / √3 + 1

(iii) (1/2)-2

(iv) 17/8

(A) (i)

(B) (ii)

(C) (iii)

(D) (iv)