Question

A car with speed 60 km/hr takes 8 hours to travel some distance. Who
should be the increase in the speed if the same distance is to be covered in
7 hours?​

Answer 1

Answer:

68.57km/ hr

Step-by-step explanation:

this is inverse variation.

let the speed be x

so x×y= constant

60×8=7×x

x=60×8/7

x=68.57

Ans=68.57 km/hr

Answer 2

Answer:

420 km

Step-by-step explanation:

Speed of the car: 60 km/hr

time it travel: 8 hrs

distance cover in 1hr: 60 km (The speed is the distance cover)

distance cover in 7 hour: 60 km x7 hr =420 km

(total distance is 480 km. So we can solve this problem another way

total distance: 60x8=480 km

distance cover in 1hr: 60 km

so we can substract 60 from 480=420 km

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