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प्रश्न
The speed of a motorboat is 20 km/hr. For covering the distance of 15 km the boat took 1 hour more upstream than downstream.
Which is the correct quadratic equation for the speed of the current?
विकल्प
x2 + 30x − 200 = 0
x2 + 20x − 400 = 0
x2 + 30x − 400 = 0
x2 − 20x − 400 = 0
MCQ
उत्तर
x2 + 30x − 400 = 0
shaalaa.com
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