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Nupur
- Rate N$210
- Response 1h
N$210/hr
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- algebra
- trigonometry
- arithmetic
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About Nupur
I am student of class 12 i am bit good in maths... I want to teach students who are younger than me....as my knowledge also increases by this...and i hope u will find it very easy and also u will enjoy while study maths
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About the lesson
- Junior Secondary Education
levels :
Junior Secondary Education
- English
All languages in which the lesson is available :
English
Ques..An iron pipe is 21cm long and its external diameter is 8cm. If the thickness of pipe is 1cm and iron weighs 8g/cm^3,find the weight of the pipe.
Solution-external radius of pipe=4cm {diameter=8cm}
Thickness of the pipe=1cm
Internal radius of the pipe=(4-1)cm=3cm
External volume=(22/7*4*4*21)=1056 cm^3 {vol.of cylinder=pie(r^2)l
Internal volume=(22/7*3*3*21)=594cm^3
Vol.of metal=(external volume)-(internal volume)
=(1056-594)=462cm^3
Weight of the pipe=(462*8)g=(462*8/1000)kg=3.696kg
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Rates
Rate
- N$210
Pack prices
- 5h: N$1050
- 10h: N$2100
online
- N$210/h
Details
If i am busy as i am also student then i would like to charge rs 500 extra..
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