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secondary 2 | Maths
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Need help with these two questions
Date Posted: 4 years ago
Views: 198
21a) Total distance = 60 + 40 = 100
Average spd =50km/h
Total time = 100/ 50 = 2hr
Time take from X to Z = 2hr
b) Time taken from Y to Z = 2hr - 45 min = 1hr 15 min = 75min
Speed from Y to Z = 40/75 * 60 = 32km /hr
Average spd =50km/h
Total time = 100/ 50 = 2hr
Time take from X to Z = 2hr
b) Time taken from Y to Z = 2hr - 45 min = 1hr 15 min = 75min
Speed from Y to Z = 40/75 * 60 = 32km /hr
22) s = k r^0.5
12 = k(8)
k = 1.5
s= 1.5 * (81)^0.5 = 1.5 * 9 = 13.5
(13.5-12)/12 *100% = 12.5%
12 = k(8)
k = 1.5
s= 1.5 * (81)^0.5 = 1.5 * 9 = 13.5
(13.5-12)/12 *100% = 12.5%
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