Latest TCS Aptitude Question SOLUTION: one the planet oz ,there are 8 days in a week sunday to sat and anoter day called oz day .there are 36 hrs a day n each hr has 90 min n each min 60 sec.as on earth ,hour hand cover

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one the planet oz ,there are 8 days in a week sunday to sat and anoter day called oz day .there are 36 hrs a day n each hr has 90 min n each min 60 sec.as on earth ,hour hand covers the dial twice every day .fint te apprximate angle betwn te hands of clock on oz when time is 14.40am?any simple way to solve
options
83
74
129
65

Asked In TCS shreya (12 years ago)

Unsolved Read Solution (3)

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Catena  (12 years ago)

pos of hr hand at 14.40am = pos at 14.00am + offset of 40mins
= 360deg/18hrs * [14hrs + (40/90)hrs]
= 288.89deg

pos of min hand after 40 mins = 360deg/90min * 40min
= 160deg

=> relative position = 289 - 160
= 129deg

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chintan Makwana  (12 years ago)

ANS: 129 deg

36 hours a day mane the clk will be of 18 hours.
18 hours covrs 360 deg
Thus 1 hour covrs 20 deg
14 hours covers 14*20=280 deg
ekhon,1 hour in 90 min
thus in 90min the hour hand goes 20deg
tai, for 1min hr hand goes 2/9deg
sei jonne, for 40 min hour hnd goes (2/9)*40deg=80/9deg=9deg(approx)
thus hr hand covrs total of 240+9=249deg
now min hand covrs=40*4=160deg
(karon, 90min=360deg
1min=4deg)

hus angle betwn them 289-160=129deg

Is this solution Helpfull? Yes (5) | No   

jaimin  (12 years ago)

Angle covered by hour hand in 1 hour = 360/18 = 20 degree

in one min 20/90 = 2/9 degree

angle covered by minute hand in one min = 360/90 = 4 degree

relative degree difference = 4 - 2/9 = 34/9

now -240 + 34/9 * 40 = 88.88

so 89 degree

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