1.

Solve it plzzzz. ???!​

Answer»

\underline{\sf{\bigstar\ Given:-}}

\bullet\sf \ speed_1= 6km/h\ \ ; \ \bullet\ Time_1= 2hours\\ \\ \\ \bullet\sf\ speed_2= 4km/h\ \ ; \ \bullet\ Time_2=3hours

\underline{\sf{\bigstar\ To\ <klux>FIND</klux> :-}}

We have to find the average speed of GIRL & Total distance COVERED by the Girl !

\underline{\bigstar{\sf\ According\ to \ Formula :-}}

FIRST find the distance

\sf\ Speed = \dfrac{Distance }{Time}\\ \\ \longrightarrow\sf S_1= \dfrac{D_1}{T_1}\\ \\ \longrightarrow\sf 6= \dfrac{d_1}{2}\\ \\ \longrightarrow\sf 12=d_1 --------(i)

Now distance covered in 2nd PART

\longrightarrow\sf S_2= \dfrac{D_2}{T_2}\\ \\ \longrightarrow\sf 4= \dfrac{d_2}{3}\\ \\ \longrightarrow\sf 12=d_2--------(ii)

Now ,

Total distance = Equation (i) + Equation (ii)

Total distance = 12+12= 24 km

Now find the Average speed !

\boxed{\sf\ Average \ speed = \dfrac{Total \ distance }{Total \ Time}}

\longrightarrow\sf Av. \ speed = \dfrac{d_1+d_2}{t_1+t_2}\\ \\ \longrightarrow\sf Av. \ speed = \dfrac{24}{2+3}\\ \\ \longrightarrow\sf Av.\ speed = \cancel{\dfrac{24}{5}}\\ \\ \longrightarrow\sf Av.\ speed = 4.8km/h

\underline{\bigstar{\sf\ Average\ speed = 4.8km/h}}

\underline{\bigstar{\sf\ Total \ Distance= 24km}}


Discussion

No Comment Found

Related InterviewSolutions