Question

A journey takes 4 hours 30 minutes at a speed of 60km/h. how long will the same journey take at a speed of 15 m/sec?​

Answer 1

$\huge\text{\underline{Answer}}$

Time taken = 4 hours 30 minutes

Speed = 60 km / hr

First change Time in to seconds.

4 hr 30 min = 16,200 second

Now, change speed in to m/ sec.

By multiply with$\bold{\frac{5}{18}}$

$\bold{\frac {50}{3}m/sec}$

Now distance travelled during journey. $\boxed{\sf{S = V × T}}$

Putting the value of V and T.

$\implies$ $\bold{s = \frac{50}{3} \times 16200 }$

$\implies$ $\bold{5400 × 50 }$

= 27,0000 m or 270 km

Now,when speed is 15 m / sec

Then,distance travelled during journey.

$s = 15 \times 16200$

$s = 243000 \: or \: 243 \: km \:$