KS15 wrote:
Bunuel wrote:
Is the time required to travel d miles at r miles per hour greater than the time required to travel D miles at R miles per hour?
(1) d = D + 20
(2) r = R + 20
@Bunuel-Can you please post OE for this? I got C, so would like to know how E is the answer?
chetan2uHi
KS15My take on this question is
t = d/r
T = D/R
d = D + 20
Let D be 10 so d = 30
let r be = 5 so 30/5 = 6
If R = 2 then T = 10/2 = 5
6 > 5 yes
If R = 1 then T = 10/1 = 10
6 > 10 no
A is insufficient.
The same thing can be said about statement 2)
So insufficient.
Combined
D+20/R+20 > D/R
R (D + 20) > D (R + 20)
D = 5
R = 1
25 > 105 no
If D = 1
R = 5
105 > 25 yes.
Thus even combined insufficient.
I hope this helps
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