The table given below present the sunrise (SR) and sunset (SS) timings in a city during six consecutive days of a week. It is given that the total daylight time (in hrs) = T, and (12-T) expressed in hours is P.
|
Days |
D1 |
D2 |
D3 |
D4 |
D5 |
D6 |
|
SR |
0544 |
0542 |
0536 |
0545 |
0550 |
0539 |
|
SS |
1730 |
1715 |
1736 |
1730 |
1728 |
1727 |
What is average of P for D3 to D6 (correct up to two decimal places)?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 0.20.
T = Sunset Time - Sunrise Time
TD3 = 17: 36 - 05:36 = 12 hours
TD4 = 17: 30 - 05 : 45 = 11 hours 45 minutes = 11.75 hours
TD5 = 17 : 28 - 05 : 50 = 11 hours 38 minutes = 11.63 hours
TD6 = 17 : 27 - 05 : 39 = 11 hours 48 minutes = 11.80 hours
Now, P = 12 - T
PD3 = 12 - 12 = 0 hours
PD4 = 12 - 11.75 = 0.25 hours
PD5 = 12 - 11.63 = 0.37 hours
PD6 = 12 - 11.80 = 0.20 hours
Required average = (0 + 0.25 + 0.37 + 0.20)/4
⇒ 0.82/4 = 0.20