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itsammy003 · 2009 July 4th, 04:30 AM

1)40% of the rats included in an experiment were male rats ,if some of the rats died during the experiment and 30%of the rats that died were male rats ,what was the ratio that died were male rats,what was the ratio of the death rate among the male rats to the death rate among the female rats ?

answer is ) 9/14 how?

2)if half the people in a room leave at the end of every 5 minutes interval ,and at the end of twenty minutes the next to last person leaves ,how many people are in the room to start with

answer is 12 .how?

3) The length and breadth of a rectangular piece of land are in the ratio of 5:3 .the owner spent Rs 3000 for surrounding it from all the sides at the rate of $ 7.50 per meter ,the difference between length and breadth is
(i didnt understand why he gave here both $'s and Rs's .do we have to convert ?

answer is 50m

2009 July 4th, 04:30 AM	#1 (permalink)
itsammy003 This user's posts are moderated. Join Date: Feb 2009 Posts: 103	dirty rats in my problem .pls solve it 1)40% of the rats included in an experiment were male rats ,if some of the rats died during the experiment and 30%of the rats that died were male rats ,what was the ratio that died were male rats,what was the ratio of the death rate among the male rats to the death rate among the female rats ? answer is ) 9/14 how? 2)if half the people in a room leave at the end of every 5 minutes interval ,and at the end of twenty minutes the next to last person leaves ,how many people are in the room to start with answer is 12 .how? 3) The length and breadth of a rectangular piece of land are in the ratio of 5:3 .the owner spent Rs 3000 for surrounding it from all the sides at the rate of $ 7.50 per meter ,the difference between length and breadth is (i didnt understand why he gave here both $'s and Rs's .do we have to convert ? answer is 50m Last edited by itsammy003 : 2009 July 4th at 04:50 AM.