An aeroplane travelled a distance of 400 km at an average speed of ‘ km/hr. On the return journey the speed was increased by 40 km/hr.

Write down an equation for the time taken by the onward and return journey. If the return journey took 30mins less than the onward journey, write down an equation in and find its value.

200 km/hr

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120 km/hr

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80 km/hr

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160 km/hr

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180 km/hr

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Solution

The correct option is D
160 km/hr

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The correct option is D 160 km/hr

The correct option is D
160 km/hr