A train travelling in a circular track of 0.75 km of radíus at 22 km/hr. Find the angle in degrees through which it turns in one minute.​

Step-by-step explanation:

Radius of circular track=r=0.75km

Circumference=2πr=2πkm

Speed of train=36 km\hr

Distance moved by train in 30 seconds =36×

3600

30

=

10

3

km

For 2π km, train turns 2π

c

∴ For

10

3

km, train turns

10

3

c

=

π

54

∘

1 minute of arc=

60

1

∘

Angle turned by train =(

π

54×60

) minutes of arc.

≃1031 minutes

vận tốc22

chiềudai0.75

t=1/60

đ=111/30

the monthly balance will be $75,000

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