Question

culculate the time in (a) New York and in (b) Tokyo when it's 10:00am in Mumbai (mumbai lies at 73° E longitude, New York at 74° w and Tokyo at 140° E )

Answer 1

Answer :-

♦ Point to be considered before solving .

• The sun crosses every longitude in 4 min .

♦ Now we will find out the longitudinal difference .

◾ Given

Longitude of

▪️Mumbai = 73° E

▪️New York = 74° W

▪️Japan = 140° E

• Now longitudinal difference between New York and Mumbai ..

= -(73 + 74 )

= -147°

Hence time difference = (-147) × 4

= -588 min

or

(-588)/60

= (-49)/5 hrs

or

= -9.8 hrs

Now Time at New York

= 10:00 am - 9 : 48

= 12 : 12 pm (Night)

• Now longitudinal difference between Mumbai and Tokyo .

= (140 - 73)

= 67°

Hence Time difference

= 67 × 4

= 268 min

or

= (268)/60

= 4 hrs and 28 min

Now Time at Tokyo

= 10:00 am + 4:28

= 14:28 hrs

= 2:28 pm