# 1) the train moving evenly with a speed of 150 km/h, passes by a column in 18 seconds. Find train length in meters. Thanks in advance) 2) the perimeter of a triangle is equal to 11 cm. One party is twice less another 3 cm less than the third. Find the parties of a triangle

Gritus

27

1) 150km/h x 18/3600 = 150 x 1/200 = 0.75 km = 750 m 2) p = a+b+c = 11 let 1 party = x. then 2 - the 2nd. 3 - x +3. let's make uravn. x the +2nd + x +3 = 11 of the 4th = 8. x =2 2 - the first party. 2+2=4 - the second party. 2+3 = 5 - the third.

95

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Martyn

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