Latest TCS Aptitude Question SOLUTION: On a planet Oz there are 8 days in a week, Sunday to Saturday and another day called Oz day. There are 36 hrs in a day and each day has 90 minutes while each minute has 60 sec. As

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On a planet Oz there are 8 days in a week, Sunday to Saturday and another day called Oz day. There are 36 hrs in a day and each day has 90 minutes while each minute has 60 sec. As on earth the hour hand covers the dial twice every day. Find the approximate angle between the hands on clock on Oz when the time is 11:40 am
69 degrees, 86 degrees, 231 degrees, 51 degrees

Solution

36 hours a day means the clock will make a complete round in 18 hours.
18 hour covers 360 deg
Thus 1 hour covers 20 deg
11 hour covers 11*20=220 deg
now 1 hour = 90 min
thus in 90min the hour hand goes 20deg
so for 1min hr hand will go 2/9 deg
for 40 min hour hand will go (2/9)*40deg = 80/9deg = 9deg(approx)
thus hr hand will cover total of 220+9 = 229deg
now min hand covers =40*4deg = 160deg
(This is because 90min = 360deg implies 1min = 4deg)
Thus angle between these hands = (229-160)deg = 69deg
This answer is given by CHINTAN MAKWANA and is correct answer


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Asked In TCS Deepesh goyal (12 years ago)

Solved Read Solution (2)

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Read Solution (2) :

chintan Makwana  (12 years ago)

36 hours a day mane the clk will be of 18 hours.
18 hours covrs 360 deg
Thus 1 hour covrs 20 deg
11 hours covers 11*20=220 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 220+9=229deg
now min hand covrs=40*4=160deg
(karon, 90min=360deg
1min=4deg)

hus angle betwn them 229-160=69deg

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manas ranjan panda  (12 years ago)

one trick for all this type of angle qestion
20H-34M/9
where H hour &m min
here h 11 &m 40 put value 20*11-34*40/9=68.89~69
feedback pls

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