HOW CAN JULY AND AUGUST TOGETHER HAVE 31 DAYS?

my lessons are not coming in the chapter time 

please tell me why

 what is a minuete ? please tell the answer guys.

 In chapter 7 ,the spelling  february  is  spelled wrong

what is A.M

what is time?

 but my ques is that y year hving 00 in the last should be divisible by 400 .

eg 1900 is divisible by 4 but it is not divisible by 400 so it is not considered as a leap year. y?

a leap year comes after 4 years then y it should be divisible by 400 when there is 00 in the last?

 There is a country. It is a strange country. It has no leap years. In 1 km distance the time varies for 1 minute. In one of the cities in the country the time is 6:15. another city is 635 km away from that city. 

(a) What is the time in the second city mentioned?

(b) What will be the time in the first and second city after 75 years?

ghhfhnfnfdn vx

asha begins her leave on 16th october .The last day of her leave is 4th novemberr.How many days did she remain on leave

Mr. gupte  left for shimla on 29th may and came back to delhi on 25th june.how  long did he stay

nipun mother arrived on june25 and left on july 18 how long did she stay?

HOW MUCH TIME  DOES THE LIGHT TAKES TO GO ACROSS THE MILKY WAY GALAXY ?