Question

A cyclist rides into the country at an average speed of 10 miles per hour. When his bicycle gets a flat tire, he walks it back at an average speed of 3 miles per hour. If he returns home 6 and a half hours later after he starts, how far into the country does he go?

Answer 1

A cyclist rides into the country at an average speed of 10 miles per hour. When his bicycle gets a flat tire, he walks it back at an average speed of 3 miles per hour. If he returns home 6 and a half hours after he starts i.e the total time including the bike time and walk time of the cyclist be 6.5 hours.

Answer 2

Answer:

Jiri’s age is 43

Pamela is 5 years younger mean

Mean Jiri is old 5 years, take number of Jiri age minus Pamela age.

-> J-5=P

The sum mean plus

P+J=81

Use substitution for the equation 1 to find the answer.

(J-5) +J=81

2J-5=81

2J=86

J=43