A field is 90m x 45m, next to a circular lake, 20m across. For training, the coach says your team can either run around the lake 3 times or run along 2 sides of the pitch and then back along the diagonal. Which run is the shortest?
C=2pir C=10pi2 = 20pi = 62.83185 62.83185 * 3= 188.5m z= root(90^2 + 45^2) = 100.62 l=100.62+90+45 = 235.6 m They should run around the lake.
OK
Related Maths GCSE answers
All answers ▸Rearrange the following equation to make 'm' the subject: 4 (m - 2) = t (5m + 3) [4 marks]
A linear sequence starts: a+2b, a+6b, a+10b, ..., ... The 2nd term has a value of 8. The 5th term has a value of 44. Work out the values of a and b.
Given the curve y=x^2 -6x +8, find the turning point.
Solve the quadratic equation x^2 + 4x +1 = 0 by completing the square.