The wheels revolve round a common horizontal axis. They make 15 20 and 48 revolutions in a minute respectively. Starting with a certain point on the circumference down wards. After what interval of time will they come together in the same position?

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Solution

Time for one revolution $= \frac{60}{15} = 4, \frac{60}{20} = 3, \frac{60}{48} = \frac{5}{4}$
LCM of $4, 3, \frac{5}{4}$ .= LCM of Numerators/HCF of Denominators $= \frac{60}{1} = 60$

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The wheels revolve round a common horizontal axis. They make 15 20 and 48 revolutions in a minute respectively. Starting with a certain point on the circumference down wards. After what interval of time will they come together in the same position?

Time for one revolution =6015=4,6020=3,6048=54 LCM of 4,3,54.= LCM of Numerators/HCF of Denominators =601=60

Time for one revolution $= \frac{60}{15} = 4, \frac{60}{20} = 3, \frac{60}{48} = \frac{5}{4}$
LCM of $4, 3, \frac{5}{4}$ .= LCM of Numerators/HCF of Denominators $= \frac{60}{1} = 60$