Greenline bus service from rajiv chowk to kilpauk stadium has improved . Buses are right available through the morning at an interval of 35 mts each .If the bus service starts at 6:30 am and runs till 1:30pm.How many times is service available?

Answer :

Given  :  Buses are right available through the morning at an interval of 35 minutes each .

And start from  6: 30 am 
So,
Next time bus available at = 6 : 30 + 00 : 35  =  7 : 05  am

Next time bus available at = 7:05 + 00 : 35  =  7 : 40  am

Next time bus available at = 7:40 + 00 : 35  =  8 : 15  am

Next time bus available at = 8:15 + 00 : 35  =  8 : 50  am

Next time bus available at = 8:50 + 00 : 35  =  9 : 25  am

Next time bus available at = 9:25 + 00 : 35  =  10 : 00  am

Next time bus available at = 10: 00 + 00 : 35  =  10 : 35  am

Next time bus available at = 10 : 35 + 00 : 35  =  11 : 10  am

Next time bus available at = 11 : 10 + 00 : 35  =  11 : 45  am

Next time bus available at = 11 : 45 + 00 : 35  =  12 : 20  pm

Next time bus available at = 12 : 20 + 00 : 35  =  12 : 55  pm

Next time bus available at = 12 : 55 + 00 : 35  =  1 : 30  pm

So,
Bus service available total  13 times in between 6 : 30 am to 1 : 30 pm at interval of 35 minutes .  ( Ans )