23yes i think it is 16 min 40 secs
An insect is at the bottom of a tree that is 12m tall. Its takes 3 min 20 secs to crawl around the base of the trunk once. After this the insect starts to crawl up the trunk of the tree in a regular spiral. It makes 4 rounds of the tree and reaches the top of the tree at a point directly above the point from which it had started. If the speed of the insect is 2 cm/s, what is the time taken to reach the top of the tree from the moment it starts to walk in a spiral?
(Assume the tree to be a right circular cylinder)
1. 13 min 20 s
2. 16 min 40 s
3. 17 min 20 s
4. 18 min
5. 19 min 40 s
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5 Answers
23
IS IT CORRECT??
pls see dis guyz
http://targetiit.com/iit-jee-forum/posts/chemical-equilibrium-pls-see-dis-12109.html
156Yes (b) is the correct answer and the method by qwerty is also good :)
23tnx [4] so is der any oder method?
pls see dis guyz
http://targetiit.com/iit-jee-forum/posts/chemical-equilibrium-pls-see-dis-12109.html