a and b walked in a circular path of 900 metre in circumference,starting together from the same point in the same direction.If their speeds are 150 metre per minute and 200 metre per minute respectively,after how many minute will they be again at the starting point?
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2
Answer:
T = Distance/speed
900 / 150 = 6 min
900 / 200 = 4 1/2 min
6-4 1/2 = 1 1/2 min
They again meet. after 1 1/2 min
Answered by
2
Answer:
lcm of l/a,l/b where l is length is 900 ,a and b is 150 and 200 respectively
=900/150 ,900/200
=6/1,9/2
then lcm of 6/1,9/2
lcm of 6,9 is 18
hcf of 1,2 is 1
we know lcm in fraction = lcm /hcf
=18/1
=18 minute.
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