Question

A train is moving at a uniform speed of 75 km/hour .
(i) find the time required to cover the distance of 250 km and
(ii) how far will it travel in 20 minutes?

Answer 1

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:

i) 1200 sec

ii) 41.66m