Question

Complete the sentence by selecting the
correct option:
(a) The earth requires 24 hours for one rotation. In one hour,
(i) 5 longitudes will face the sun
(ii) 10 longitudes will face the sun
(iii) 15 longitudes will face the sun
(iv) 20 longitudes will face the sun

(b) To calculate the difference between the local times of any two places on the earth,
(i) the noon time at both the places should be known
(ii) the difference in degrees of their longitudes should be known
(iii) the difference in standard times of both the places should be known

(iv) Changes need to be made
according to International
Date Line
(c) The differene between the local
time of any two consecutive
longitudes is
(i) 15 minutes
(ii) 04 minutes
(iii) 30 minutes
(iv) 60 minutes
_____
(c) A football match being played at Sao Paulo, Brazil started in
India at 6 am IST. Explain what would be the local time at Sao
Paulo?
_____

Answer 1

Answer:

(a)-iii

(b)-ii

(c)-ii

(c) - no. I don't know bro sorry

Answer 2

$\red{\bigstar} \; \underline{\underline{\frak{\pmb{\blue{Required \; Answers:}}}}}$

Q.] Complete the sentence by selecting the  correct option:

(a) The earth requires 24 hours for one rotation. In one hour,

• 5 longitudes will face the sun
• 10 longitudes will face the sun
• 15 longitudes will face the sun
• 20 longitudes will face the sun

$\red{\leadsto} \; {\bf{15 \; longitudes \; will \; face \; the \; sun.}}$

     

(b) To calculate the difference between the local times of any two places on the earth,

• the noon-time at both the places should be known
• the difference in degrees of their longitudes should be known
• the difference in standard times of both the places should be known
• Changes need to be made  according to International  Date Line

$\red{\leadsto} \; {\bf{the \; difference \; in \; degrees \; of \; their \; longitudes \; should \; be \; known.}}$

     

(c) The difference between the local  time of any two consecutive  longitudes is,

• 15 minutes
• 04 minutes
• 30 minutes
• 60 minutes

$\red{\leadsto} \; {\bf{04 \; minutes}}$

       

(c) A football match being played at Sao Paulo, Brazil started in  India at 6 a.m. IST. Explain what would be the local time at Sao  Paulo?

The longitudinal difference between India and Sao Paulo is  127.5° . For 1° longitude, the difference is of 4 minutes.

Therefore, for 127.5° longitudes:

• $\red{\leadsto} \; {\sf{127.5 \times 4 = 510 \; minutes}}$
• $\red{\leadsto} \; {\sf{510 \div 60 \; mins. \; is \; 8 \;hrs. \; 30 \; mins.}}$

As it is to the west of India, the time at Sao Paulo will be behind  by 8 hours 30 minutes.

$\red{\leadsto} \; \underline{\sf{\therefore \; the \; local \; time \; there \; will \; be \; 9.30 \; p.m. \; on \; the \; previous \; day.}}$