Login
Login
Sign up
Start
Mathmania
Teacher tutorials
TOP
Subjects
Bridge Course
Testworks
Subject updates
Ya+
News
Send feedback
See more
Contacts
About Us
Terms and Conditions
Privacy Policy
PDF chapter test
TRY NOW
Subjects
Science CBSE
Class 9
Sound
Textbook based HOTS II
30.
Multiple choice question XXX
Exercise condition:
2
m.
How far away should a deep sea diver be from an under-sea rock so that he can hear his own echo? (Speed of sound in water is \(1500\ m/s\)).
\(1500\ m\)
\(750\ m\)
\(150\ m\)
\(75\ m\)
Login
or
Fast registration
Previous exercise
Exit to the topic
Next exercise
Send feedback
Did you find an error?
Send it to us!