Question

A man of weight 60 kg.wt takes a body of mass 15 kg at a height of 10 m on a building in 3 minutes. The efficiency of man is -

a) 10%

b) 20%

c)30%

d) 40%

Answer 1

@experimentX @estudier @UnkleRhaukus @hartnn @.Sam. @phi @jhonyy9 @jiteshmeghwal9 @jiteshmeghwal9

Answer 2

@Jonask @Callisto @Hero @Yahoo! @hba

Answer 3

The first step would be to make data :)

Answer 4

how?

Answer 5

Data:

W=60 kg

h=10 m

t=3 min--convert into seconds

m=15 kg

Answer 6

Do you know how to convert it into seconds ? @mayankdevnani

Answer 7

times to 60 sekon., ok

Answer 8

yaa

Answer 9

t=3*60=180 s

Answer 10

right @hba

Answer 11

Well and yeah efficiency is unknown so include it in the data :)

\[\in=?\]

Answer 12

Now See the appropriate formula,

Answer 13

efisiensi = (using power/initial power) x 100%

Answer 14

efficiency formula = (Wout/Win)*100%

Answer 15

Wout is the work done by the machine is called the output work

Win is the work done by you on a machine is called the input work
efficiency= useful work output/work input

Answer 16

i think it is a proper sign

Answer 17

Yeah right :D

Answer 18

yes

Answer 19

Work=Force*distance

Answer 20

P = w/t

Answer 21

\[ \eta\]

Answer 22

hey!! symbol=? any name

Answer 23

Efficiency

Answer 24

no it;'s eta

Answer 25

Oh Eta

Answer 26

yaa

Answer 27

yes eta is eficiency symbol

Answer 28

then

Answer 29

efficiency formula = (Pout/Pin)*100%

Answer 30

@TheViper

Answer 31

@experimentX

Answer 32

LOL you called every member !!!!!!!!

Answer 33

but i need solution

Answer 34

@Yahoo!

Answer 35

can anyone solve my problem......

Answer 36

I think everyone is trying :)

Answer 37

yaa... but no one is answering...

Answer 38

@Preetha

Answer 39

@mayankdevnani is the answer 20%???

Answer 40

yaa but how? @Yahoo!

Answer 41

efficiency formula = (Wout/Win)*100%

Answer 42

ok

Answer 43

Wat is the Work Done by the Man...

W = 15 *10 * 10=1500 (W=f*d)

Answer 44

Work Done on the man is 60 +15 = 75 kg

W = 75 *10*10 = 7500

Answer 45

Eff = (1500/7500)*100 = 20%

Answer 46

@mayankdevnani u got it.....)

Answer 47

1 min....

Answer 48

thnx....... @Yahoo!