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CBSE Class 10 Answered

A tap supplies water at 22degree celcius. a man takes 11 litre water per minute at 37degree celcius from geyser. calculate work done by geyser. ANSWER-1575W
 
 
 
Please give step-by-step answer. what is the method soluving this kind of question?
Asked by Divyaa | 14 Oct, 2016, 06:45: PM
answered-by-expert Expert Answer
begin mathsize 16px style The space given space rows space are space as space shown space below. 35 space space space space 7 space space space space 2 12 space space space space 16 space space space straight x Let space us space beign space by space finding space the space resultant space of space the space first space row. Since space odd space number comma space 35 comma space is space followed space by space straight a space prime space odd space number comma space 7 comma space use space rule space left parenthesis straight v right parenthesis So comma space 35 space divided by space 7 space equals space 5 The space resultant space which space is space an space odd space number comma space 5 comma space is space followed space by space an space even space number comma space 2 comma space so comma space we space use space rule space left parenthesis iv right parenthesis So comma space 5 space minus space 2 space equals space 3 Thus comma space the space resultant space of space the space first space row space is space 3. Moving space on space to space the space second space row. It space is space given space that space straight x space is space the space resultant space of space the space first space row comma space so space straight x space equals space 3. In space the space second space row comma space since space an space even space number comma space 12 space is space followed space by space straight a space number space which space is space straight a space perfect space square comma space 16 comma space we space use space rule space left parenthesis iii right parenthesis comma to space get space 16 space minus space 12 space equals space 4 The space resultant space being space an space even space number comma space 4 comma space is space followed space by space an space odd space number comma space straight x space equals space 3 comma space which space is space NOT space composite space so space we space use space rule space left parenthesis ii right parenthesis comma to space get space 4 space plus space 3 space equals space 7 Thus comma space the space resultant space of space the space second space row space is space 7. Hence comma space the space product space of space the space resultants space is space 3 space cross times space 7 space equals space 21. So comma space the space correct space option space is space left parenthesis straight D right parenthesis. end style
Kindly post only 1 question per query.
Answered by Rebecca Fernandes | 26 Oct, 2016, 11:25: AM
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