Question

A car covers 30 km at a uniform speed of 60km/h and the next 30km at a uniform speed of 40 km /h . find the total time taken .

Answer 1

$\huge\mathcal\colorbox{lavender}{{\color{b}{✿Yøur-Añswer♡}}}$

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$\bf\underline \blue {To \: \mathscr{f}ind:-} \\ we \: need \: to \: find \: Total \: time \: taken \: by \: car \: to \: cover \: whole \: journey.\\ \huge\bf\underline \green{ \mathcal{S}olution...} \\\bf\underline{\purple{Given:-}} \\ Case 1st :- \\ ✫ Car \: cover \: 30 km \: with \: a \: uniform \: speed \: of \: 60km/hr. \\ we know that, \\ \huge\star \: \bf \red{time \: = \frac{distance}{speed} } \\ ⋆So, \\ Speed = 60km/hr \\ Distance = 30km \\ ↛ Time \: taken = 30/60 \\ ↛ Time t \: aken = 1/2 hr \\ Case 2nd :- \\ After \: that t \: he \: car \: covers \: next \: 30 \: km \: at \: 40 km/hr. \\ Speed = 40km/hr \\ Distance = 30km \\ ↛ Time \: taken = 30/40 \\ ↛ Time \: taken = 3/4 hr \\ Total \: time t \: aken \: b y \: car :- \\ = 1/2 + 3/4 \\ = (2 + 3)/4 \\ = 5/4 hr. \\ Hence, \\ Total t \: ime t \: aken \: by \: car = 5/4 hr$

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