Question

A car moving at a speed of 60 km/h covers a certain distance in 4 hours. How much time will it take to cover the same distance if its speed is reduced by 20 km/h? ​

Answer 1

Answer:

160 Km

Step-by-step explanation:

D = S × T

D = 60 km/he × 4 hrs

D = 240 km

60 km/hr - 20 = 40 km/hr

same formula

40 km/hr × 4 hrs

D = 160 km

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Answer 2

Step-by-step explanation:

We know that

"the speed is a physical quantity defined as the ratio of distance to time."

Therefore,

distance = speed x time

distance = 60 x 4 = 240 km

$\bf \: the \: speed \: was \: 60 + 20 = 80 km/h \\ \bf then \: the \: same \: distance \: covered \: by \: time \: \\ \bf = \frac{distance}{speed}$

$\bf= \frac{240}{80} \\ \red{ \bf = 3 hours}$

Thus, if Had the speed been 80 kmph, it would have taken only 3 hours to cover the same distance.

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