Q.

An explorer travelled a distance of 61 km in 9 hours. He travelled partly on foot at the rate of 4 km/hr. and partly on bicycle at the rate of 9 km/hr. The distance travelled on foot is

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a

16 km

b

14 km

c

15 km

d

7 km

answer is A.

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Detailed Solution

Let the distance travelled on foot is x km.

Distance travelled on bicycle = 61 - x 

According to question,

x4+61x9=99x+4(61x)=9×369x+2444x=3245x=80x=16km

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