Question
A fishing motor boat sails at a speed of 50 kmph without any iron boxes on it. For every iron box of added to it, the speed of engine reduces by 10% of the earlier speed. At most how many boxes can be added so that the ship can cover a distance of 225 km in a maximum of 10 hrs? (Assume that the only additions which impede the performance of the boat are iron boxes and that all iron boxes have a weight of 7 kgs)
Answer: Option C
:
C
Minimum speed at which the boat can go = 22.5 kmph
Now go from answer options
If 8 boxes are added, the speed after reduction will be (0.9)8×50=<22.5kmph
Thus, the maximum number of boxes which can be added will very close to and slightly less than 8. Answer is 7 boxes
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:
C
Minimum speed at which the boat can go = 22.5 kmph
Now go from answer options
If 8 boxes are added, the speed after reduction will be (0.9)8×50=<22.5kmph
Thus, the maximum number of boxes which can be added will very close to and slightly less than 8. Answer is 7 boxes
Was this answer helpful ?
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