A set of data is presented in the form of a frequency distribution table with class intervals and their respective frequencies. The lower boundary of the modal class is 50, the frequency of the modal class is 35, the frequency of the class interval just succeeding the modal class is 20, the frequency of the class interval just preceding the modal class is 28, and the width of the class intervals is 8. Find the mode of the data.
ATQ, 
L = Lower boundary of the modal class 45. f1= Frequency of the modal class 35. f0 = Frequency of the class interval just preceding the modal class 28. f2= Frequency of the class interval just succeeding the modal class 20. h = Width of the class intervals 8. 
If ∆ ABC~∆ FDE such that AB = 9 cm, AC = 11 cm, DF = 16 cm and DE = 12 cm, then the length of BC is:
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