Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 11-science Answered

The speed of sound is nearly 341m/s, if a car of wheel radius 70 cm moves with a speed of sound. Find the number of revolutions it will make in 10 sec.
Asked by Topperlearning User | 31 May, 2016, 08:51: AM
answered-by-expert Expert Answer

Let n be the number of revolution a wheel makes in 10 sec.

 
The distance travelled by the wheel  in 10 sec is 3410 m
 
Therefore, n x  = 3410
 
 
rightwards double arrow n equals fraction numerator 3410 over denominator 2 πr end fraction equals fraction numerator 3410 cross times 7 over denominator 2 cross times 22 cross times 0.7 end fraction equals 775 space r e v o l u t i o n s
Answered by | 31 May, 2016, 10:51: AM

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 11-science - Maths
sin 135 degree
Asked by SasipriyaNagappan | 26 Jul, 2023, 06:55: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Maths
sin135º
Asked by jgftudx6545 | 29 Nov, 2020, 08:00: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Maths
The minute hand of a watch is 1.5 cm long far does its tip move in 40 minutes 
Asked by durgassonawane | 21 Jul, 2019, 05:27: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Maths
Find the radius of the circle in which a central angle of 45o intercepts an arc of length 154 cm.
Asked by Topperlearning User | 06 Aug, 2014, 10:27: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Maths
Find the angle between the minute hand and the hour hand of a clock when the time is 5:20.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Maths
  Convert  into radian measure.
Asked by Topperlearning User | 06 Aug, 2014, 10:34: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Maths
 Convert 22.22c into degree measure.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Maths
Kunal’s heart beats 72 times in one minute. If the length of second hand of watch is 4.5 cm. Find the distance travelled by the tip of second’s hand of watch when Kunal’s heart beats 300 times.
Asked by Topperlearning User | 31 May, 2016, 08:49: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Maths
The speed of sound is nearly 341m/s, if a car of wheel radius 70 cm moves with a speed of sound. Find the number of revolutions it will make in 10 sec.
Asked by Topperlearning User | 31 May, 2016, 08:51: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Maths
If in two circles,  arcs of same length, subtend angles 120o and 150o at the centre, find the ratio of their radii.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×