The hands of a clock coincide 22 times in a day.
11 times in 12hours
22
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11 times in 12hours
22
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let the average of 25 person be x
total age of a person=average×no.of person
total age of 25 person=X×25
=25X
when a new person of 46kg come average decrease by 5kg(X-5)
Total age of 26 person =25x+46
Average age of 26 person=X-5
A/Q
.25X+46=26(X-5)
25X+46=26X-130
26X-25X=130+46
X =176
hence the av. of 25 person be 176kg
slower train - 48 kmph = 40/3 m/s
say faster train, v m/s
therefore, {v-(40/3)}*180 = 600, => v= 60 kmph
Explanation:
They should share the profits in the ratio of their investments.
The ratio of the investments made by A and B =
6000 : 8000 => 3:4
40
x - 30 = 1/4 x || *4
4x - 120 = x || -x + 120
3x = 120 || /3
x = 40
9 days
1056/(2*pi*r)=1056/(2*3.14*14)=1059/88 =12 revolution