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Student from School, City
Subject :NSO    Class : Class 8

Sound waves were sent down from a ship and they returned after 2 seconds. What is the depth of the sea, if the speed of sound in water is 1.5 km s–1?

A 150 m
B 3 km
C 1.5 km
D 750 m


Ans 1:

Student from School, City
Class : Class 5

Ans 2:

Student from School, City
Class : Class 5

Ans 3:

Advika Singh from The Tribhuvan School, Patna
Class : Class 8

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