Question

In covering a distance of 30 km, Amit takes 2 hrs more

than suresh. If Amit double his speed, then he would take

1 hr less than Suresh. Amit’s speed is?​

Answer 1

Answer:

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Step-by-step explanation:

Let speed of Amit be xkm/hr and speed of Suresh by y km/hr

ATP

x

30

​

−

y

30

​

=2

x

1

​

−

y

1

​

=

15

1

​

........(i)

and  

y

30

​

−

2x

30

​

=1

−

2x

1

​

+

y

1

​

=

30

1

​

......(ii)

x

1

​

−

y

1

​

=

15

1

​

−

2x

1

​

+

y

1

​

=

30

1

​

---------------------------------------------------------------

2x

1

​

=

10

1

​

x=5

So, Amit's speed =5km/hr

Answer 2

Let speed of Amit be xkm/hr and speed of Suresh by y km/hr

ATP

30/x- 30/y=2

1/x- 1/y=1/15 ........(i)

and

30/y - 30/2x= 1

- 1/2x + 1/y = 1/30 ......(ii)

-------------------------------------------------------------

1/2x = 1/10

x=5

So, Amit's speed =5km/hr