Question

Two Cars, A and B, (starting, at the same time, from the same point) are moving
with average speeds of 40 km/h and 50 km/h, respectively, in the same direction.
Find how far will Car B be from Car A after 3 hours.
peed of​

Answer 1

$\huge\mathfrak{\bf{\underline{\underline{Given\ :-}}}}$

$\longrightarrow \: \mathbf{ Speed \: of \: car \: A = 40 \: km /\: hr }$

$\longrightarrow \: \mathbf{Speed \: of \: car \:B = 50 \: km / \: hr}$

$\huge\mathfrak{\bf{\underline{\underline{Formula \ we \ should \ know \ :-}}}}$

$\longrightarrow \mathbf{Average \: Speed = \frac{Total \: Distance}{Total \: Time} }$

$\huge\mathfrak{\bf{\underline{\underline{To \ Find \ :-}}}}$

$\mathbf{Distance \: of \: car \: B \: from \: car \: A \: after \: 3 \: hour}$

$\huge\mathfrak{\bf{\underline{\underline{Solution \ :-}}}}$

$\mathsf{We \: Have,}$

$\longrightarrow \mathsf{Average Speed = \frac{Total \: Distance}{Total \: Time} }$

$\mathsf{Total \: Distance \: covered \: by \: car \: A\:after\: 3hrs \: will \: be}$

$\implies \: \mathbf {(40)(3) = 120 \: km}$

$\mathsf{Total \: Distance \: covered \: by \: car \:B \:after\: 3hrs \: will \: be}$

$\implies \: \mathbf{(50)(3) = 150 \: km}$

Thus,

Car B is 150-120=120 km ahead from car A.

$\huge\mathfrak{\bf{\underline{\underline{\blue{Answer \ :}}}}}$$\huge \longrightarrow \underline{ \underline\blue{\mathsf {30 \: km}}}$