Question

12. An aeroplane takes one hour forty minutes
to cover a distance 1250 km. Whereas a
helicopter takes two hours and forty
minutes to cover a distance of 400 km. Find
the ratio of the speeds of the two.
2.5 km /m​

Answer 1

for aeroplane

time taken = 1 hr 40 min =

hours

distance = 1350 km

speed =

=

=

= 810 km/h

for helicopter

time taken = 2 hr 40 min =

hrs

distance = 600 km

speed =

=

=

= 225 km/h

then ratio of their speeds are 810 : 225 = 18:5

hence ,

ratio of the speed of the two​ is 18:5

#Learn more:

An aeroplane takes 1 hour 40 minutes to cover a distance 1250 kilometre where is helicopter takes 2 hours and 40 minutes to cover a distance of 400 kilometre find the ratio of the speed of the two​

Answer 2

Answer:

18:5

Explanation:

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