To Download PDF
Please verify your Whatsapp number first,
so you can download this pdf immediately
![](https://cdn.prod.website-files.com/5f5cf462f0ee5f4a999616bb/6597ba4553aab5ce1cf16062_1211.webp)
An echo is heard in 3s. What is the distance of the reflecting surface from the source, given that the speed of sound is 342 ms–1?
Speed of sound in air = 342 m/s
Time to hear the echo = 3 s
Distance from the source to the reflecting surface,
2d = v x t
d = (v x t) / 2
d = (342 x 3) / 2
d = 513 m
CBSE Class 10 Sample PapersMaths StandardMaths BasicHindi AHindi BSocial ScienceScienceSanskritEnglish
Please verify your Whatsapp number first,
so you can download this pdf immediately
Please type a valid 10 digit whatsapp number
OTP sent, check your whatsapp
Your OTP is incorrect, Please enter valid OTP