Book Online Demo

Check Your IQ

Try Test

Courses

Dropper NEET Course Dropper JEE Course Class - 12 NEET Course Class - 12 JEE Course Class - 11 NEET Course Class - 11 JEE Course Class - 10 Foundation NEET Course Class - 10 Foundation JEE Course Class - 10 CBSE Course Class - 9 Foundation NEET Course Class - 9 Foundation JEE Course Class -9 CBSE Course Class - 8 CBSE Course Class - 7 CBSE Course Class - 6 CBSE Course

Offline Centres

Two children are at opposite ends of an aluminium rod. One strikes the end of the rod with a stone. The ratio of times taken by the sound wave in the air and in aluminium to reach the second child is ____.

see full answer

Talk to JEE/NEET 2025 Toppers - Learn What Actually Works!

Real Strategies. Real People. Real Success Stories - Just 1 call away

An Intiative by Sri Chaitanya

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

Two children are at opposite ends of an aluminium rod. One strikes the end of the rod with a stone. The ratio of times taken by the sound wave in the air and in aluminium to reach the second child is

18.88

.
Let the distance between the two children be

d .

Also, let the time taken by sound to reach another child via air be

t_{1}

and via aluminium rod be

t_{2}

.
The velocity of sound in air,

v_{a} = 340 m / s

t_{1} = d / v_{a}

= d / 340

----------------

(1)

Velocity of sound in aluminium rod,

v_{r} = 6420 m / s

t_{2} = d / v_{r}

= d / 6420

---------------

(2)

Divide equation

(1)

by equation

(2),

we get

t_{1} / t_{2} = 6420 / 340

= 18.88

Watch 3-min video & get full concept clarity

Result Producing online coaching for JEE/NEET of south India

Largest All India Test Series for JEE/NEET

Best Books for IIT JEE

Best Books for NEET

How to Join IIT after 10th

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Get Expert Academic Guidance – Connect with a Counselor Today!

Result Producing online coaching for JEE/NEET of south India

Largest All India Test Series for JEE/NEET

Best Books for IIT JEE

Best Books for NEET

How to Join IIT after 10th