A car can reach a certain place in 12 hours at a speed of 60 km per ho

1.	A car can reach a certain place in 12 hours at a speed of 60 km per hour. By how much should the speed increased so that it completely the journey in 10 hours?
Answer» ⠀⠀ıllıllı uoᴉʇnloS ıllıllı $\setlength{\unitlength}{1.0 cm}}\begin{picture}(12,4)\thicklines\put(1,1){\line(1,0){6.5}}\put(1,1.1){\line(1,0){6.5}}\end{picture}$ Given: SPEED of the car = 60km/hr Time taken by the car = 12 hours Distance to be TRAVELLED = (60 x 12) km ➠ 720km Therefore: The speed to be INCREASED in 10 hours ➠ 720/10 km/hr ➠ 72 km/hr ➠ (72 - 60) Km/hr ➠ 12 Km/hr So, the DIFFERENCE in the speed = 12 km/hr $\setlength{\unitlength}{1.0 cm}}\begin{picture}(12,4)\thicklines\put(1,1){\line(1,0){6.5}}\put(1,1.1){\line(1,0){6.5}}\end{picture}$

A car can reach a certain place in 12 hours at a speed of 60 km per hour. By how much should the speed increased so that it completely the journey in 10 hours?

Answer»

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Given:

Distance to be TRAVELLED = (60 x 12) km

Therefore:

The speed to be INCREASED in 10 hours

➠ 720/10 km/hr

➠ 72 km/hr

➠ (72 - 60) Km/hr

➠ 12 Km/hr

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