ru

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Популярное Word Problems >

A woman can bicycle 42 miles in the same time as it takes her to walk 14 miles. She can ride 7 mph faster than she can walk. How fast can she walk?

Решение

A w o man c an bi cyc l e 42 mi l es in t h e s am e t im e a s i t t ak es h er t o w a l k 14 mi l es . S h e c an r i d e 7 m p h f a s t er t han s h e c an w a l k . Ho w f a s t c an s h e w a l k ?

Решение

walking speed : 3.5

Шаги решения

Translate the problem into an equation:

\frac{42}{x + 7} = \frac{14}{x}

Решите для

x, \frac{42}{x + 7} = \frac{14}{x} : x = \frac{7}{2}

После упрощения получаем

walking speed : 3.5

Популярные примеры

seven greater than eight sevenths of a number Cole just measured his dog and found out that it weighs 17 kilograms, which is 70% more than the last time Cole measured. How much did the dog weigh last time?the разность between a number and-17 is equal to the product of the number and 25 Alejandro is going to invest in an account paying an interest rate of 3.2% compounded continuously. How much would Alejandro need to invest, to the nearest ten dollars, for the value of the account to reach 161,000 in 20 years?A bank offers an investment account with an annual interest rate of 1.44% compounded quarterly. Mai invests \$3700 into the account for 5 years. Assuming no withdrawals are made, how much money is in Mai's account after 5 years?