SSC Government Jobs Exams Numerical Ability Area and Volume

The diameter of a right circular cone is increased
by 10% and its height is decreased by 10%. The
percentage increase in its volume is-
(A) 3.9% (B) 5.9%
(C) 8.9% (D) 10%

Read Solution (Total 1)

c
v1=1/3*pi*r^2*h
the changed volume, v2=1/3*pi*(1.1r)^2*(.9h)
now v2/v1=1.089
%v2/v1=108.9
so changed volume= 108.9-100=8.9%
11 years agoHelpfull: Yes(0) No(1)

SSC Other Question

.Insert the missing number. 34, 7, 37, 14, 40, 28, 43, (...)

Options
1) 31
2) 42
3) 46
4) 56 The 5th, 8th and 11th terms of a G.P. are a, b, c
respectively, then which one of the following is
true -
(A) 2b = ac (B) b2
= ac
(C) a + b + c = 0 (D) None of these