There are four bells, which toll at intervals of 3, 7, 12 and 14 seconds respectively. The four
bells begin to toll at 12 O’clock. When will they next toll together and how often will they do so in 14
minutes?
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Salmon starts walking towards his home with a speed of 0.5m/s for first 10 minutes. Suddenly a dog starts to chase him so he runs at a speed of 4m/s for next 4 minutes and reaches home. Calculate Salmons average speed
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