1971.
If the length, breadth and total surface area of a cuboid are 30 cm, 20 cm and 2600 cm2, respectively, then find its height.
(A)
30 cm
(B)
15 cm
(C)
50 cm
(D)
14 cm
1972.
The average age of 24 workers and their supervisor is 41 years. If the supervisor's age is excluded, the average reduces by
0.75 years. The age of the supervisor is:
(A)
59 years
(B)
41 years 9 months
(C)
40 years 9 months
(D)
49 years
1973.
In an election between two candidates, one candidate gets 72% of the total votes cast. If the total votes are 1000, by how
many votes does the winner win the election?
(A)
360
(B)
250
(C)
720
(D)
440
1974.
∆ABC and ∆DEF are similar and their areas are respectively 0.64 m2 and 0.0121 m2. If EF = 0.154 m, then BC is:
(A)
1.15 m
(B)
11.2 m
(C)
1.12 m
(D)
2.12 m
1975.
PQ is a chord of a circle. The tangent XR at point X on the circle intersects the extension of PQ at point R. Given that XR =
12 cm, PQ = x cm, and QR = (x - 2) cm, find the value of x.
(A)
11 cm
(B)
9 cm
(C)
8 cm
(D)
10 cm
1976.
Simplify
(A)
(B)
(C)
(D)
1977.
A number is first increased by 44% and then decreased by 30%. The net percentage change (rounded off to the nearest
integer) in the original number is:
(A)
increase by 1%
(B)
decrease by 4%
(C)
increase by 4%
(D)
decrease by 1%
1978.
Write the smallest digit in the blank space of a number 7__7624, so that the number formed is divisible by 3.
(A)
1
(B)
2
(C)
0
(D)
3
1979.
The diameter of the base of a cylindrical tank is 28 cm and its height is 42 cm. Find its curved surface area.
(A)
(B)
(C)
(D)
1980.
The radii of two concentric circles are 35 cm and 21 cm. If the chord of the greater circle is a tangent to the smaller circle,
then the length of that chord is:
