Question

Two cars run to a place at the speed of 45km/h and 60km/h if the second car takes 5 hrs less than the first for the journey find the length of the journey

Answer 1

Answer:

900 km

Step-by-step explanation:

d= {xy/(x±y)}×t

={45×60/(60-45)}×5

={2700/15}×5

=180×5

=900 km

other way

let ,length is x km

45 km goes 1 h

1 km goes$\frac{x}{45}$

samilarly $\frac{x}{60}$

now we can write

$\frac{x}{45}$-$\frac{x}{60}$=5

$\frac{4x-3x}{180} =5$$\frac{x}{180}=5$

x=5×180

x=900 km