en fotboll plan har måtten 112.5 läng och 64m bredd.karin gräset på planen mee en motordriven gräsklippare som har klippbreden 1 m karin går med hastighete 1,5m per sekund .hur lång tid ta det för hene att klipa hela plannen om hon klippe effktivt som möjligt
+128456
A football plane has dimensions 112.5 long and 64m wide. Karin grasses on the plane along a motor-powered lawnmower that has the cutting edge 1m karin runs at a speed of 1.5m per second .has long time take it for her to cut the whole plan if she cut effectively possible
Cutting along the longest dimension of the field, it will take her 112.5 / 1.5 = 75 seconds = 1 + 1/4 min = 5/4 min to cut a 1 m wide swath
And she must do this 64 times to cut the entire field.....so
64 * (5/4) min =
64/4 * 5 =
16 * 5 =
80 min total
