Question

there are 5 bells placed at different swings in a park which toll at intervals of 2,3,5,6,10 min respectively. they all toll together when the park is open for visitors at 10am. how many more times do they all toll together till the park is closed at 8pm?

a)10 b)20 c) 30 d) 60

Answer 1

Answer:

Option B is the answer 20

Step-by-step explanation:

First find the LCM of the numbers

LCM=30

So the bells toll together every 30 minutes, but we need to find how many times the bell tolls together between 10am and 8pm .

So the answer is 20 times. Just add 1 toll every 30 minutes till 8pm.