Question

Tye train is 160 m long crosses a person in 4 sec Determine its speed in

¡} m/sec and

¡¡} km/hr




And another ques.


. ¡f the side of the cube is 17 cm then find total surface area of cube






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Pls give corrects ans
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Answer 1

Answer:

speed= distance / time so 160 m/ 4 sec = 40 m/ sec

Answer 2

Explanation:

length of train=l=160m

time =t=4sec

speed=v=?

v=length/time=distance/time

v=160/4

v=40m/sec

now v=40×3.6km/hr

V=144km/hr

second question

side of cube=a=17cm

surface area of cube=A=6a²

A=6(17)²

A=1734cm²