Question

a car travels 60 km in 1 hour 30 minutes how long will it take to cover a distance of 100 KM at same speed

Answer 1

$distance \: travelled = 60 \: km. \\ time \: taken = 1 \: hour \: 30 \: minutes \: = 1.5 \: hours. \\ speed = \frac{distance}{time} \\ = \frac{60}{1.5} \\ = \frac{60 \times 10}{1.5 \times 10} \\ = \frac{600}{15} \\ = 40 \: km {h}^{ - 1} \\ \\ distance = 100 \: km \\ time = \frac{distance}{speed} \\ = \frac{100}{40} \\ = \frac{10}{4} \\ = 2.5 hours. \\ = 2 \: hours \: 30 \: minutes.$

Answer 2

We know that 60 minutes = 1 hour.

Then, 30 minutes = (1/2) hour = 0.5 hours.

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Given that A car travels 60 km in 1.5 hours.

We know that Speed = Distance/Time

                                   = 60/1.5

                                   = 40 km/hr.

Given that it covers a distance of 100 Km at same speed.

= > We know that Time = Distance/Speed

                                       = 100/40

                                       = 2.5 hours.

Therefore, it will take 2.5 hours (or) 2 hours 30 minutes.

Hope it helps!