Math, asked by avirealhero, 11 months ago

ek bus ke pahiye ki radius 0.75 meter hai aur vo 1/2 minute me 84 round pure kr leta hai tab us pahiye ki speed km/h me batao

Answers

Answered by harshitmunot28

sabse phele pahiye ka circumference nikalenge

c = 2 $\pi$ r

let pi = 3.14

c= 2 * 3.14 * 0.75 m

=4.71 m

ab circumference ko 84 se multiply karenge total distance nikalne ke liye

d= c * 84

= 4.71 * 84 m

=395.64 m

time = 1/2 min = 30 secs

distance = 395.64 m

therefore, speed = d/t

=395.64/30

=13.188 m/sec

=13.188 * 3.6

=47.4768 km/h

anmol3421: radius of tyre = r = 0.75 m = 3/4 m
now if the tyre completes 1 round it covers a distance 2πr because it is rolling on its edge
so
84 rounds means
distance = 84×(2πr) = 84(2)(22/7)(3/4) = 396 m = 0.396 km

time = 1/2 minute = 1/120 hours.....(divided by 60)

now speed = distance / time
speed= ( 0.396 / (1/120) ) km/hr
so
speed is 47.52 km/hr

avirealhero: thanks

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