Question

Breadth of the tank, b 4 m 80 cm 480 cm
Height of the tank, h
300 cm
= 600 x 480 x 300 cu. cm = 86400000 am
Thus, the volume of the tank is 86400000 cu cm.
Exercise-5
Exercise-5
Use Cordova Smart Class Software on the smart board in class to do Exercise
What is the volume of a cuboid which is 40 cm long. 24 cm thick and 18 cm high?
A cubical container is of side 6.2 cm. Find the amount of water it can hold.
A wall is to be built using bricks of dimensions 20 cm x 16 cm x 8 cm. How many bricks will
be required if the wall is 10 m long, 5 m high and 64 cmn thick?
A water tank is 150 cm long and 45 cm deep. Find the width of the tank if it contains 576
litres of water, given that 1 litre = 1000 cu. cm.
A metal rod of dimensions 180 cm x 120 cm x 100 cm is melted and recast into cubes. If the
length of each cube is 60 cm, how many cubes are formed?
Cordova Learning Series MATHEMATICS-5अब वाटर टैंक ​

Answer 1

Answer:

Initial velocity u=30 km/h=30×

18

5

=

3

25

m/s

Final velocity v=60 km/h=60×

18

5

=

3

50

m/s

Mass m=1500 kg

Work done W=

2

1

mv

2

−

2

1

mu

2

⟹ W=

2

m

(v

2

−u

2

)=

2

1500

×((

3

50

)

2

−(

3

25

)

2

)=156187 J