প্রশ্ন ও উত্তর
A boat sails m miles upstream at the rate of r miles per hour. If the rate of the stream is s miles per hour, how long will it take the boat to return to its starting point?
গণিত Time and Distance 07 Oct, 2020
প্রশ্ন A boat sails m miles upstream at the rate of r miles per hour. If the rate of the stream is s miles per hour, how long will it take the boat to return to its starting point?
সঠিক উত্তর
m/(r + 2s)
মন্তব্য
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