Subject
বিগত বছরের প্রশ্ন
Topic
বিসিএস ২৮ তম
If a man swims 4 miles upstream at 1 mph and back downstream to the same point at 4 mph, what is his average speed?
If a man swims 4 miles upstream at 1 mph and back downstream to the same point at 4 mph, what is his average speed?
ক)
0.8 mphখ)
1.6 mphগ)
2.4 mphঘ)
3.2 mphExplanation
Total 5 ঘণ্টায় যায় 8m 1 ঘণ্টায় যায় 8/5 = 1.6 m সুতরাং, গড় গতি 1.6mphRelated questions
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