She biked 40 minutes.She ran 20 minutes.She swam 35 min.
Step-by-step explanation:
since you have 95 minutes for all parts first subtracted 15 from what she swam the you have four equal parts left the time she ram then twice she ran she biked and then the she swam 15 minutes More that she ran so you dived 95-15 which is 80 80/4 is 20 so she ran 20 min so 20 x 2 is 40 for she bike 40 then 20+15 is 35 so 40+20+35=95 an hour an 35 minutes
A^2 + b^2 = c^2...a and b are the legs and c is the hypotenuse 20^2 + 21^2 = c^2 400 + 441 = c^2 841 = c^2 sqrt 841 = c 29 = c <== third straw will be 29 cm
