神马作文网英语翻译1.It takes a little boy 90seconds to climb the 60 meters
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英语翻译
1.It takes a little boy 90seconds to climb the 60 meters length of an escalator which is not working.When in operation,the escalator lifts a passenger from bottom to top in 60 seconds.How long does it take the boy to cover the 60 meters,if he walks on the moving escalator?
2.A circle of radius 2 rolls completely around the inside perimer of a square of side 10.What distance is covered by the centre of the circle?
3.In the Capital Airport,there are many moving sidewalks,they travel at 4 km/h.A pedestrian walking at 6 km/h covers I km on a sidewalk going in the same direction as the sidewalk and then comes back to the starting point walking in the opposite direction from the movement of the sidewalk.How long the round trip take?
1.It takes a little boy 90seconds to climb the 60 meters length of an escalator which is not working.When in operation,the escalator lifts a passenger from bottom to top in 60 seconds.How long does it take the boy to cover the 60 meters,if he walks on the moving escalator?
2.A circle of radius 2 rolls completely around the inside perimer of a square of side 10.What distance is covered by the centre of the circle?
3.In the Capital Airport,there are many moving sidewalks,they travel at 4 km/h.A pedestrian walking at 6 km/h covers I km on a sidewalk going in the same direction as the sidewalk and then comes back to the starting point walking in the opposite direction from the movement of the sidewalk.How long the round trip take?
1.小男孩儿花了90秒的时间爬上了60米长的停止运行的电扶梯.当电梯运行时,它可以用60秒将一个人从底部运到顶端.当男孩在运行的电梯上向上走,问他到达60米的高出需用多长时间?
60/(1+60/90)=36
2.（perimer是啥意思啊）
一个半径为2的圆环在周长为10的正方形内滚动（?）,问圆环走过的距离
不懂啥意思啊!
3.在首都机场有很多自动人行道,速度为4 km/h.一个行人以6 km/h的速度于自动人行道同方向的在人行道上走过1 km,再在自动人行道上反方向的走回到起点.问共花费多长时间?
t1=1/(4+6)=0.1
t2=1/(6-4)=0.5
所以共花费0.6h
60/(1+60/90)=36
2.（perimer是啥意思啊）
一个半径为2的圆环在周长为10的正方形内滚动（?）,问圆环走过的距离
不懂啥意思啊!
3.在首都机场有很多自动人行道,速度为4 km/h.一个行人以6 km/h的速度于自动人行道同方向的在人行道上走过1 km,再在自动人行道上反方向的走回到起点.问共花费多长时间?
t1=1/(4+6)=0.1
t2=1/(6-4)=0.5
所以共花费0.6h
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