標題:
F.2 Mathz.
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發問:
1) Janet paddles a canoe in still water at a speed of 4m/s.She can go 1200m in 5 minutes.How long will she take to travel 1000m?================================================================2) It is given that an interior angle of a quadrilateral is 60?, and the other three interior angles are in the ratio... 顯示更多 1) Janet paddles a canoe in still water at a speed of 4m/s.She can go 1200m in 5 minutes.How long will she take to travel 1000m? ================================================================ 2) It is given that an interior angle of a quadrilateral is 60?, and the other three interior angles are in the ratio 13:29:18. What is the smallest interior angle of the quadrilateral? * Please show me your step of calculation..Thanks a lot.
最佳解答:
1000/4=250s 250/60=4.17min angles sum of interior angle of a quadrilateral = 360 sum of the other three interior angles = 360 - 60 =300 13+29+18=60 for da ratio 13 = 13/60 times 300 = 65 4 da ratio 29 = 29/60 x 300 = 145 4 sa ratio 18 = 18/60 x 300 = 90 so da smallest = 60
其他解答:
1 ) 1000 / 4= 250seconds 250 / 60 = 4 minutes and 10 seconds 2 ) 360-60=300 ( sum of three other angles) 300/(13+29+18) X 13(smallest) =300/50 X13 =78 2007-01-01 19:05:54 補充： 300/60 X13=65
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