A watch ticks 90 times in 95 seconds and another watch ticks 315 times in 323 sec. If
both the watches are started together, how many times will they tick together in the first
hour?

• LCM of 95/90 &323/315 = LCM of 95,323/ HCF of 90, 315
  = 19*5*17/45
  The no. of times they will tick in the first 3600 sec = 3600 / 19*5*17/45= 3600*45/19*5*17 =100..
  Once they have already ticked in the beginning ; so in 1 hour they will tick 100+1= 101 times.
• 8 years agoHelpfull: Yes(0) No(0)