Answer:
(a) 
Step-by-step explanation:
Given


Required
Determine the time in each lap
The unit time in each lap is calculated by dividing the total time by the number of laps; i.e.;

Substitute values for Time and Lap

Answer:
27/125
Step-by-step explanation:
multiply it 3 times
Answer:
a2+b2=c2
Step-by-step explanation:
e.g:
a=5 b=2 c=?
52+22=c2
25+4=c2
29=c2
square root of 29= c
c=5.385164807
18+18+l+l=52
36+2l=52
-36 -36
2l=16
÷2 ÷2
l=8
Length of the rectangle is 8
Answer: A
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