1.

A takes 3 hrs more than B to walk a distance of 30 km. but if A doubles his speed he is ahead of B by 1.5 hrs . Find the speed of A and B​

Answer»

Answer:

A's SPEED 10km/3hr B's speed 5km/hr

Step-by-step explanation:

let B's speed be xkm/hr and A's speed be ykm/hr than time TAKEN by B is 30/x

so time TAKE by A is (30/x)+3

now we have

30/y = (30/x)+3 ( 1st equation)

in second condition when A's doubles his speed the equation is 30/2y = (30/x)-1.5 (2ND equation)

SOLVING this we get A's speed y=10km/3hr and B's speed x 5 km/hr


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