Question

a train moves at a constant speed of 75 km/ hr l) how far will it travel in 20 minutes 2) find the time required to cover a distance of 250 km​

Answer 1

Given: Speed of train = 75kmph

To Find: Distance Travelled in 20 minutes, Time required to cover 250km.

Formulation: Speed of the train is 75kmph, i.e, it requires 1 hour (60 minutes) for the train to cover 75km.

Formula: 

(i) Substituting x1 = 60 y1 = 75 and x2 = 20 in the formula,



Gives y2 = 25 km

∴The train will move 25km in 20 minutes

(ii) Substituting x1 = 60 y1 = 75 and y2 = 250 in the formula,



Gives x2 = 200 minutes or 3 hours 20 minutes

∴The time required to cover a distance of 250km is 3 hours 20 minutes.

Answer 2

Answer:

1. in 60 min the train travels 75 km

in 20 min the train travels 75×20/60 km

=25 km

2. 75 km travels in 1 hour

250 km travels in 250/75 hours

=10/3hours

=10/3×60 min

=10×20 min

=200 min

=3 hours 20 mins