Question 23110
1. 2(2x-5+x)=230
6x-10=230
6x=240
x=40
2(40)-5=75
Hence, the width is 40cm and the length is 75cm.


2.5x=4(x+5)
5x=4x+20
x=20
20+5 = 25
Hence her two speeds were 20miles per hours and 25 miles per hour.


3.44(t+1)+48t=274
44t+44+48t=274
92t=230
t=2.5
Hence, at 2.5h they will be 274 miles apart.


4.45(t+1)+50t=425
45t+45+50t=425 
95t=380
t=4
10:00+4 = 2:00p.m.
Hence after 4h or at 2:00 p.m. ; they will meet.