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Byju's Answer
Standard VIII
Physics
Introduction to Sound Waves
Ducks to call...
Question
Ducks
to call each other.
A
croak
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B
quack
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C
chatter
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Solution
The correct option is
B
quack
The sound made by ducks is called quack. Ducks quack to call each other.
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What do ducks do to call each other?
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A person spends ₹ 620 on geese and ducks. Each duck costs ₹ 20 and each goose costs ₹ 15. If the person bought 36 birds in all, then how many ducks did he buy?
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A person spent Rs 564 in buying geese and ducks. If each goose costs Rs 7, each duck Rs 3, and if the total number of birds bought was 108, how many of each did he buy?
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A person spent Rs.
564
in buying geese and ducks, if each goose cost Rs.
7
and each duck Rs.
3
and if the total number of birds bought was
108
, how many of each type did he buy?
Q.
In each of the questions below are given four statements followed by four conclusions numbered I, II, III and IV. You have to take the given statements to be true even if they seem to be at variance from commonly known facts. Read all the conclusions and then decide which of the given conclusions logically follows from the given statements disregarding commonly known facts.
Statements
All glasses are rooms.
Some rooms are planes.
All planes are ducks.
Some ducks are lanterns.
Conclusions
I. Some lanterns are planes.
II. Some ducks are rooms.
III. Some rooms are glasses.
IV. Some ducks are glasses.
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