Question

10. A car takes 10 hours to cover a certain distance at a uniform speed. If the speed has
been 18km more per hour, it would have taken 7 hours to cover the same distance in
kilometres. Find the distance.​

Answer 1

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Answer 2

GIVEN :-

Given speed = 18km/hr

Initial time taken = 10 hours

final time taken = 7 hours

TO FIND :-

Final distance= ?

SOLUTION :-

Let the initial speed of the car be x km/hr.

distance = time × speed

distance = 10x

Therefore,

(x+18) × 7 = 10x

7x + 126 = 10x

10x - 7x = 126

3x = 126

Therefore,

x = 126÷3

x = 42 ( speed)

hence,

distance = 10x

distance = 10 × 42

distance = 420km

FINAL ANSWER

The distance is 420km.