An airplane flies along the four sides of a square at the speeds of 100,150,200 and 250 km/h. find the average speed of the plane the field:

Options
- 203 km/h
- 201 km/h
- 200 km/h
- None

CORRECT ANSWER : None

Discussion Board
solution of this question is:::

LCM of =(100,150,200,250 )is =12000 km
time taken first side =12000/100 =120 hr.
second side =12000/150=80 hr.
third side = 12000/200 =60 hr.
fourth side = 12000/250 = 48 hr.
total time =(120+60+80+48)= 308 hr,
total distance = 4*12000 =48000 km
speed in km/hr = 48000/308 =155.8 km/hr
Ans is none


MEGHA PANDEY 06-25-2020 06:45 AM

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