projectile is launched at 300 to the horizantal with initial K.E is E then K.E at the point of maximum height is
Answers
Explanation:
AppropriateQuestion:−
The ratio of the Present Ages of Viju to that of Aju is 7 : 2.Four years from now, the ratio of the Ages of viju to aju will be 5 : 2. What was viju's age 6 years ago ?
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\large \clubs \: \bf Given : - ♣Given:−
The ratio of the Present Ages of Viju to that of Aju is 7 : 2.
Four years from now, the ratio of the Ages of viju to aju will be 5 : 2.
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\large \clubs \: \bf To \: Find : - ♣ToFind:−
Viju's Age 6 years Ago
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\large \clubs \: \bf Solution : - ♣Solution:−
Let,
Present Age of Viju = 7x years
Present Age of Aju = 2x years
《After 4 Years》
Age of Viju = (7x + 4) years
Age of Aju = (2x + 4) years
✏ According To Question :
\begin{gathered} \dfrac{7 \text x + 4}{2\text x + 4} = \dfrac{5}{2}\\ \end{gathered}
2x+4
7x+4
=
2
5
\begin{gathered}:\longmapsto2(7\text x + 4) = 5(2\text x + 4)\\\end{gathered}
:⟼2(7x+4)=5(2x+4)
\begin{gathered}:\longmapsto14\text{x + 8 = 10x + 20}\\\end{gathered}
:⟼14x + 8 = 10x + 20
\begin{gathered}:\longmapsto14\text x - 10\text x = 20 - 8\\\end{gathered}
:⟼14x−10x=20−8
\begin{gathered}:\longmapsto4\text x = 12\\\end{gathered}
:⟼4x=12
\begin{gathered}:\longmapsto\text x = \cancel\dfrac{12}{4}\\ \end{gathered}
:⟼x=
4
12
\purple{ \Large :\longmapsto \underline {\boxed{{\bf x = 3} }}}:⟼
x=3
So,
Present Age of Viju = 7 × 3 = 21 years
《 6 Years Ago 》
Viju's Age = 21 - 6
☆ Hence,