tree?
(a) 20 m (b) 40 m (c) 60 m (d) 80 m
- The angle of elevation of top of a
tree on the bank of a river from its
other bank is 60 and from a point 20
m further away from this is 30. The
width of the river is:
(a) 10 m (b) 10√ m (c) 20m (d)
20 √ m
- A man on the top of a rock rising on
a sea-shore observes a boat coming
towards it. If it takes 10 minutes for the
angle of depression to change from 30
to 60, how soon will the boat reach the
shore?
(a) 20 min (b) 15 min (c) 10 min (d) 5
min
15. A vertical pole with height more
then 100 m consists of two parts, the
lower being one-third of the whole. At a
point on a horizontal plane through the
foot and 40 m from it, the upper part
subtends an angle whose tangent is^.
What is the height of the pole?
(a) 110 m (b) 200 m (c) 120 m (d)
150 m
16. The angle of elevation of the top of
a pillar of height h at a point on the
ground at a distance x from the pillar is
30 . On walking a distance ‘d’ towards
the pillar the angle of elevation
becomes 60. Then which one of the
following is correct?
(a) x= d+h (b) x= 3d/2 (c) x= 5d/4 (d)
x= 2d
BINARY NUMBERS
- The number 10101111 in binary
system is represented in decimal
system by which one of the following
numbers?
(a) 157 (b) 175 (c) 571 (d) 751 - If the sum of the binary numbers
( ) , ( ) and
( ) is the binary number
( ) , then the values of x and
y, respectively, are:
(a) 1 and 1 (b) 1 and 0 (c) 0 and 1
(d) 0 and 0
3. What is ( ) ( ) - ( )
equal to?
(a) ( ) (b) ( ) (c) ( )
(d) ( )
4. The number 1753, in binary notation
is written as:
(a) ( )
(b)( ) (c)
( ) (d) ( )
5. What is the binary number
equivalent of the decimal number
32.25?
(a) 100010.10 (b) 100000.10 (c)
100010.01 (d) 100000.