A car start with a velocity 20Km/Hour and after every hour its speed increases by 10Km/Hour. After 8

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29 Dec 2011 Length of the journey?

A car start with a velocity 20Km/Hour and after every hour its speed increases by 10Km/Hour. After 8 hour it starts decreasing the speed 10Km/Hour after every hour and finally it stops in the destination. Total length of the journey is?

OPtion

1) 700Km
2) 800Km
3) 850Km
4) 900Km
5) 950Km
6) 1000Km
7) 600Km
8) 1100Km
9) 1200Km
10) none of these

Solution

20+30+40+50+60+70+80+90+80+70+60+50+40+30+20+10 = 800Km

Correct Option: 2 Best Solution (9)

Bhimu withLove   13 years AGO

Car starts with speed 20km per

10 km/h increase in speed till 8 hours
20+30+40+50+60+70+80+90 = 440 Km

10 km/h Decrease in speed after 8 hours
80+70+60+50+40+30+20+10+0 = 360 Km

So answer is 440 + 360 = 800...

Like? Yes (7) | No (1)  

Mayur Somatkar   13 years AGO

totally from where it start after 8 hours it covers 440 KMs & after it slows down to stop it covers 360 KMs

therefore

440+360=800KMs

Like? Yes (2) | No   

vinodkumar   13 years AGO

20+30+40+50+60+70+80+90+80+70+60+50+40+30+20+10+0=800km

Like? Yes (1) | No   

Sadhana Gadre   13 years AGO

We have to just find the area under v-t graph

Like? Yes (1) | No   

Subhankar Mondal   13 years AGO

20+30+40+50+60+70+80+90+80+70+60+50+40+30+20+10+0=
800..........

Like? Yes (1) | No   

rajendra   13 years AGO

20+30+40+50+60+70+80+90+80+70+60+50+40+30+20+10=800

Like? Yes (1) | No   

Narendra Reddy   13 years AGO

800
20+30+40+50+60+70+80+90+80+70+60+50+40+30+20+10+0=800

Like? Yes (1) | No (1)  

Shubham   13 years AGO

20+30+40+50+60+70+80+90+80+70+60+50+40+30+20+10=800

Like? Yes (1) | No (1)  

Shiv Kumar   13 years AGO

20+30+40+50+60+70+80+90+80+70+60+50+40+20+10 =800

Like? Yes (1) | No (2)