নৌকা ও স্রোত
1. Two boats, traveling at 5 and 10 kms per hour, head directly towards each other. They begin at a distance of 20 kms from each other. How far apart are they (in kms) one minute before they collide?
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সারা দেশের শিক্ষার্থীদের মধ্যে নিজের অবস্থান যাচাই
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Find the number of lead balls, each with a diameter of 1 cm, that can be made from a sphere of diameter 12 cm.
A boat can travel 36 km upstream in 5 hr. If the speed of the stream is 2.4 kmph, how much time will the boat take to cover a distance of 72 km downstream?
A boat covers a certain distance downstream in 1 hour, while it comes back in 7/2 hours. If the speed of the stream be 5 kmph, what is the speed of the boat in still water?
