Question

20
enes
y
m
e cooling the man at the roo
o
find the num
240
EXAMPLE 26
A
y stem and cooling dum
che beinning, the temperature
We w lower down the room tempe
Bocon Total temperature to be lowered down
Final temperature Initial lem"
Rate of cooling -4°C per hour
number of hours required
le room temperature to
2°C
30°C
Wa Lemperature
1 L\WL CV
ut eochat
1. Awers
Negative sign() indicates the
werature has lowered de
Bhours
The po
5.
2. The
ASSIGNMENT 1.4
2. W
1. Multiple Choice Questions (MCQ) Choose the corre
0 An object is 36 m above the sea level and another
sea level. The difference in the levels between the two
(a) 72 m (0) 0
(e)-72 m
07) The product of two integers is 128. If one integer is
(a) - 32
(b) 32
(c) 36
a) A gardener plans to plant 630 trees in 21 rows each cont
number of trees. How many trees will be there in each row
(a) 30
(b) 40
(c) 50
2. A five-storey building has two floors in basement and three floors
Total height of the building from basement is 30 m and each to
basement is 30 m and each floor is of the same
height. One person is standing on the lowest basement and another is
ther is standing at
the roof of the top floor. Find at what distances both persons are standing from the ground
ose the correct option.
the sea level and another obiect is 36 m below the
vels between the two objects is
(d) 1 m
one integer is - 4, then the other one is
(d) - 36
121 rows each containing the same
(d) 68
in basement and three floors above the ground.
nces both persons are standing from the​

Answer 1

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Step-by-step explanation:

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