monica has a piece of canvas with an area of 551 m². he uses the piece to make cone-shaped tent with a radius of 7m base. finding the volume of the tent if 1m² is wasted in taking and cutting stitches. (there is no canvas in the base of the tent)
Answers
SolutioN :-
Let the speed of the stream be x km/h.
so, speed of boat in downstream is ( 11 + x )
and also speed of boat in upstream is ( 11 - x )
Distance cover by boat is 12 km.
The speed of boat in still water is 11 km/h
\boxed{\tt \bullet \: \: \: Distance = Speed \times Time.}
∙Distance=Speed×Time.
\begin{gathered} \tt \rightarrow \dfrac{12}{11 - x} + \dfrac{12}{11 + x} = 2 \times \dfrac{3}{4} \\ \\ \end{gathered}
→
11−x
12
+
11+x
12
=2×
4
3
\begin{gathered} \tt \rightarrow \dfrac{12}{11 - x} + \dfrac{12}{11 + x} = \dfrac{11}{4} \\ \\ \end{gathered}
→
11−x
12
+
11+x
12
=
4
11
\begin{gathered} \boxed{\tt \bullet \: \: \: {a}^{2} + {b}^{2} = (a + b)(a - b)} \\ \\ \end{gathered}
∙a
2
+b
2
=(a+b)(a−b)
Answer:
1232m³
Step-by-step explanation:
Given,CSA=(551-1)m²=550m²
r=7m
CSA of cone = πrl
22/7×7×l=550
22l=550
l=25m
h=√l²-r²
=√25²-7²
=√625-49
=√576
=24m
Volume of cone = 1/3 πr²h
=1/3×22/7×7×7×24
=22×7×8
=1232m³