Helmet

Nowadays cycling better results could be obtained not only due to rider physical preparation but also thanks to using updated technologies. One of the essential parts of the rider´s equipment is his or her helmet.
While most bikers wear a helmet mainly to protect themselves, racers use modern technologies, which can improve certain features like aerodynamics and, in this way, enable them to reach a better time in a race. It´s quite essential, especially during the particular parts of the race called time trial.

Providing the helmet thanks to its advanced shape can increase the racer´s performance of a half percent. HOW MUCH can the racer shorten the time in a 40-minute time trial?

Correct result:

t =  12 s

Solution:

p=0.5100=1200=0.005  t1=40 mins=40 60 s=2400 s  t=p t1=0.005 2400=12 sp=\dfrac{ 0.5 }{ 100 }=\dfrac{ 1 }{ 200 }=0.005 \ \\ \ \\ t_{1}=40 \ min \rightarrow s=40 \cdot \ 60 \ s=2400 \ s \ \\ \ \\ t=p \cdot \ t_{1}=0.005 \cdot \ 2400=12 \ \text{s}



Our examples were largely sent or created by pupils and students themselves. Therefore, we would be pleased if you could send us any errors you found, spelling mistakes, or rephasing the example. Thank you!


Leave us a comment of this math problem and its solution (i.e. if it is still somewhat unclear...):

Showing 0 comments:
1st comment
Be the first to comment!
avatar




Tips to related online calculators
Our percentage calculator will help you quickly calculate various typical tasks with percentages.
Do you want to convert time units like minutes to seconds?

You need to know the following knowledge to solve this word math problem:

Next similar math problems:

  • Persons
    ball1_6 Persons surveyed:100 with result: Volleyball=15% Baseball=9% Sepak Takraw=8% Pingpong=8% Basketball=60% Find the average how many like Basketball and Volleyball. Please show your solution.
  • Christmas holidays
    christmas How many percent take Christmas holidays lasting 18 days from a school year that lasts 303 days? Round the result to two decimal places
  • A trip to the peak Dry
    Suchy Calculate what percentage is rising trip from Strečno to peak Suchý (Dry peak) longer than the descent back. Team trio of tourists (Palo, Peter and Andrew) rise took 4:21 and descent 3:08.
  • Profit gain
    percent_12 If 5% more is gained by selling an article for Rs. 350 than by selling it for Rs. 340, the cost of the article is:
  • Highway repair
    truck_6 The highway repair was planned for 15 days. However, it was reduced by 30%. How many days did the repair of the highway last?
  • Summerjob
    tree2 The temporary workers planted new trees. Of the total number of 500 seedlings, they managed to plant 426. How many percents did they meet the daily planting limit?
  • Percentages
    permutations_3_3 52 is what percent of 93?
  • 15 teachers
    skola_13 15 teachers teach for a combined amount of 128 days over a period of 64 days. What is this expressed as a percentage?
  • Art school
    skola_1 Every fifth pupil 9A goes to art school. How many percent of pupils in class 9A go to art school?
  • The Chemistry test
    test The Chemistry test contained 8 questions, each with 3 points. Peter scored 21 points. How many percent did Peter write a test?
  • Walking
    cargo_truck_5 Of the 450 students at the school, 432 walks to school. What percentage is this?
  • Percents
    percents2_10 How many percents is 900 greater than the number 750?
  • Reward
    metals Janko and Peter divided the reward from the brigade so that Peter got 5/8 of the reward. What percentage of Janko's reward got?
  • Job task
    clocks2_5 After two hours and 40 minutes the job is finished. Compared to last year we were 40 minutes faster. What is the percentage increase to our performance?
  • Monica
    bank_4 Monica left Php.900 to Bianca. When monica asked for it after 6 months, Bianca decided to give Php.945 instead because she was able to use the money. What interest rate on Monica's money was used by bianca?
  • Break time
    skola_1 Calculate how many percent of school time is spent on breaks. Calculate data for the whole week.
  • Fix + percentages
    car1_6 Mrs. Vargas is a car sales agent who earns Php.5,850 monthly plus a 4% commision on all her sales. During a month, she sold a car worth Php.740,000. How much is her total earnings?