The speed of a car increases by 4km after every one hour. If the distance travelled in the first hour was 40kms, what is the total distance is cover in 10 hours?

Options
- 550km
- 580km
- 600km
- 630km

CORRECT ANSWER : 580km

Discussion Board
solution

a.p. series.........
40,44,48........10terms
a=40 d=4
distance=n/2{2*a+(n-1)d}
=10/2{2*40+(10-1)4}
=5(80+36)
=5*116
=580km

Deji verma 01-28-2020 12:35 PM

Write your comments


Enter the code shown above:

(Note: If you cannot read the numbers in the above image, reload the page to generate a new one.)


Advertisement
 
▲