নৌকা ও স্রোত
1. Speed of a boat in standing water is 10 kmph and the speed of the stream is 2.5 kmph. A man rows to a place at a distance of 112.5 km and comes back to the starting point. The total time taken by him is:
Ai এর মাধ্যমে
১০ লক্ষ+ প্রশ্ন ডাটাবেজ
প্র্যাকটিস এর মাধ্যমে নিজেকে তৈরি করে ফেলো
উত্তর দিবে তোমার বই থেকে ও তোমার মত করে।
সারা দেশের শিক্ষার্থীদের মধ্যে নিজের অবস্থান যাচাই
A and B can do a piece of work in 16 days and 32 days respectively. They began to work together but A leaves after some time and B completed the remaining work in 8 days. After how many days did A leave?
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?
Three solid spheres of radii 3 cm, 4 cm, and 5 cm respectively are melted and converted into a single solid sphere. Find the radius of this sphere.
