Question

Q.835 :  तीन पहिये एक मिनट में 20, 30, 40 चक्कर लगाते है यदि वे किसी एक विशेष स्थान से चक्कर प्रारम्भ करे तो कितनी देर में वे पुनः उसी स्थान में आ जायेगे?​

Answer 1

ANSWER

2 minute

Explanation:

i hope it's answer is brainliest

the lcm of 20,30,40 = 120

102 seconds = 2 mi nute

Answer 2

Answer:

let the 3 wheels are A,B and C

A takes time for 20 revolution is 1minute=60sec

so A takes time for 1 revolution =60/20=3 sec

B takes time for 30 revolution is same 60 sec

so B takes time for 1 revolution is 60/40=2 sec

Similarly C takes time for 1 revolution is 60/40=3/2

for finding the answer we have to find lcm of 3,2,3/2

that means lcm of numerator/hcf of denominator

so lcm (3,2,3)/hcf (1,1,2) = 6/1=6sec