NIFT PG 2020 Question Paper with solutions

Question : 4 of 150

Marks: +1, -0

A farmer travelled a distance of

61 {km}

9 {h}

. He travelled partly on foot at the rate

4 {km} \/ {h}

and partly one bicycle at the rate

9 {km} \/ {h}

. The distance travelled on foot is

Solution:

Let the farmer covered

d

km on foot. Then, according to the question,

\;{d}/{4}+\;{61-d}/{9}=9

[ ∵

Time

=\;{\;\text " Distance "\;}/{\;\text " Speed "\;}]

⇒ \;{9 d+244-4 d}/{36} ⇒ 5 d+244=324

⇒ 5 d=80 ⇒ d=16 {km}

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