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15: A steel pipe of 20 mm inner diameter and 2 mm
thickness is covered with 20 mm thick of fiber glass
insulation (k = 0.05 W/m degree). If the inside and
outside convective coefficients are 10 W/m2 degree
and 5 W/m2 degree, calculate the overall heat transfer
coefficient based on inside diameter of pipe. In the
diagram, the diameter of small circle is 20 mm
Answers
Answer:
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Given :
Time taken by mahesh to reach the maket from his house on his cycle is 15 minutes.
The speed of the cycle is 4 m/s.
\;\large\underbrace{\underline{\sf{Understanding\;the\;Concept}}}
UnderstandingtheConcept
In question, We are given the values of time taken and speed of the cycle to reach from ramesh home to market. To find the distance between the ramesh house and market, we have to multiply speed with the time.
To calculate :
The distance between his house and market = ?
Solution :
To find the distance = ?
We know that,
\quad \red{\underline{\boxed{\sf Distance \ = \ Speed \times Time}}}
Distance = Speed×Time
Put the given values in the above formula.
\implies \sf Distance \ = \ 4 \times 15⟹Distance = 4×15
\implies \sf Distance \ = \ 60 \ meters.⟹Distance = 60 meters.
\begin{gathered} \\ \end{gathered}
Now,
Converting meter into kilometres,
\implies \sf 60 \times 60 \ = \ 3600 km⟹60×60 = 3600km
\implies \sf \dfrac {3600}{1000}⟹
1000
3600
\implies \sf 3.6 \ km⟹3.6 km
\begin{gathered} \\ \end{gathered}