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How many hours are needed to travel a distance of 100 km, if a bus travels a distance of 20 km in 2 hours? |
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Answer» Answer: Let the distance TRAVELLED at 100 km/hr be x km. Then, distance travelled at 50 km/hr is (170 - x) km. Given, 100 x
+ 50 (170−x)
=2 ⇒ 100 x+2(170−x)
=2⇒x+240−2x=200 ⇒x=140km. ∴ Distance travelled at 50 km/hr =(170−140)km=30km |
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