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urgent help 4 maths paper 4

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godfather93:
but how did you get the shaded area?

godfather93:
astar please help! ???

twilight:
get the shaded area in terms of h .. then the total area in terms of h .. and divide .. the h will get canceled

for the first diagram =>    answer is     (0.5 x 1 x h) / (0.5 x 4 x h)   x 100  =   1/4 x 100 = 25%

for the second diagram =>      (0.5 x 1 x h) / (4 x h)   x 100  =  1/8 x 100 = 12.5%

got it?

godfather93:
i totally get it. Thank you very much. I was using the same method as you showed above before but i was making a very stupid mistake. I took the area, especially, of the triangle as being 1/4*b*h insteas of 1/8*b*h.
Thank you once again! (+rep)

twilight:
ur welcum ;)

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