A wheel of a car of radius 21 cms is rotating at 600 RPM. What is the speed of the car in km/hr?

Question

This is a test for the genius.

Answer 1

In each minute it goes 600*2*21*Pi(3.14)=79128 cm in minute which is 0.79128 KM in 1 minute so in 60 minutes it will be 0.79128*60.....
47.4768 km/h

Answer 2

each and every time the tire rotates, the vehicle will bypass forward with the aid of the tire's circumference. C=2?r C=42? as a results of fact it is vacationing at six hundred RPM, it travels six hundred(42?) cm/m, or 79168.13 cm/m Use conversions to get km/hr. Divide with the aid of one hundred,000 to get cm -> km, multiply with the aid of 60 to get m -> hr. very final answer is forty 8 km/h

Answer 3

C = 2 π r
C = 2 π x 21 cm
In 1 min will travel :-
(42 π x 600) cm
In 1 hour will travel:-
60 x (42π x 600) cm
= 36000 x 42π cm
= 47500 m
= 47 . 5 km
Speed = 47 . 5 km / hour

Answer 4

first convert radius into km. so its .00021 km in radius

then find the circumference using tht radius in km...which is .about .001319

then multiply this circum. by 600 to get distance traveld in 1minute
which equlas about .7917 km per minute

so now multiply this by 60 to turn this into km/hr

which equals about 47.5008 km/hr

best answer?

Answer 5

C = Circumference = ( 2) ( pi ) ( r ) = ( 42 ) ( pi ) cm

V = ( N sub RPM ) ( C )

V = [( 600 ) ( 60 )] [ ( 42 /100 ) ( pi )] [ 1 / 1000 ]

V = [ 36,000 ] [ (42 / 100)( pi ) ] [ 1 / 1000 ]

V = ( 15.12 ) ( pi ) km. per hr.

V = 47.50 km. per hr.

Answer 6

V = 2 * .21m * Pi * 600rev/min * 60min/hr /(1000m/km) = 47.5 kph

Answer 7

w=600RPM=10RPS=20pi rad /s
V=rw=21*20pi cm/s=420picm/s
=13.195m/s
=47.5 km/h.ANS

Answer 8

21cm x2 = 42cm x pi = 131.88 (using 3.14 as pi) = .0013188Km x 6000 (RPM x RPH) = 7.9128 KMPH

600 (rpm) \ 60 (Minutes) = 10 RPH


ANSWER:.:.:.: 7.9128 KMPH