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vikashkumar

· started a discussion

· 1 Months ago

short trick (Question:946085.0)

provide short trick plz

Question:

A bus starts running with the initial speed of 33 km/hr and its speed increases every hour by certain amount. If it takes 7 hours to cover a distance of 315 km, then what will be hourly increment (in km/hr) in the speed of the bus? 

Options:
A)

1

B)

2

C)

3

D)

4

Solution:
Distance for first hour= s

              second hour=s+d

              third hour=s+2d

            fourth hour=s+3d

               fifth hour=s+4d

              sixth hour=s+5d

          seventh hour=s+6d

\(6\times33+21d=315 \)

21d=315-231

21d=84

d=4

hourly increment= 4km/hr

Knowledge Expert

· commented

· 1 Months ago

Dear student,
Given solution is not healthy.
Keep learning,
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