Question

5. jack is faster than paul, jake and paul each walk 24 km. the sum f their speed is 7 km per hour. and the sum of times taken by them is 14 hours. then jack’s speed is a. 4 kmphb. 3kmphc.5 kmphd.2 kmph

Answer 1

Since distance=24 km

Let jake speed=x kmph

Paul speed=y kmph

a/c to question
x+y=7
or
y=7-x
now,
24/x+24/y=14
or 24/x+24/7-x=14
or
1/x+1/7-x=14/24=7/12
x+7-x/7x-x*x=7/12

By solving
x=3,4
or 
y=4,3

By using option
4km/h



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Answer 2

Given that speed of Jake is greater than Paul


Distance = 24 km



Sum of their speed is 7 km/h = J+P

So possible speed ratio between J & P is

Go by Option




5:2 = (24/5)+(24/2) ≠ 14 Hours


4:3 = (24/4)+(24/3) = 14 Hours


So Jake’s speed is 4km/h

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