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A small aeroplane can travel at 320 km/h...

A small aeroplane can travel at 320 km/hr in still air. The wind is blowing at a constant speed of 40 km/hr. The total time for a journey against the wind is 135 minutes. What will be the time, in minutes for the return journey with the wind? (Ignore take off and landing times for the aeroplane.)

A

94.5

B

105

C

108.125

D

120

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The correct Answer is:
B
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S CHAND IIT JEE FOUNDATION-DISTANCE, TIME AND SPEED -Section-A (Question Bank-21(a))
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  7. A man covered a certain distance at some speed Had he moved 3 kmph ...

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  8. A and B are 25 km apart. If they travel in opposite directions, they m...

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  9. A small aeroplane can travel at 320 km/hr in still air. The wind is bl...

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  10. A man reduces his speed to two-third to walk a distance and consequent...

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  11. If I walk at 3 km/hr, I miss a train by 2 minutes. If, however, I walk...

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  16. A starts from a place P to go to a place Q. At the same time B starts ...

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  17. In covering a certain distance, the speeds of A and B are in the ra...

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  18. A and B run a kilometre and A wins by 25 sec. A and C run a kilometre ...

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  19. A hare sees a dog 200 m away from her and scuds off in the opposite di...

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