vi

English

Español

Português

Français

Deutsch

Italiano

Русский

中文(简体)

한국어

日本語

Tiếng Việt

עברית

العربية

Phổ biến Word Problems >

What is the trung bình speed of a race car if it reaches the finish line of a 420km long race in one and a half hours?

Lời Giải

Wha t i s t h e a v er a g e s p ee d o f a r a ce c a r i f i t re a c h es t h e f ini s h l in e o f a 420 km l o n g r a ce in o n e an d a ha l f h o u rs ?

Lời Giải

speed : 280

Các bước giải pháp

Translate the problem into an equation:

420 = x \frac{3}{2}

Giải

x, 420 = x \frac{3}{2} : x = 280

speed : 280

Ví dụ phổ biến

The greater of 2 numbers is 15 more than the lesser number . 5 times the greater number is 40 more than 12 times the lesser numbers . What is the lesser number The sum of two numbers is 1111. Thrice the smaller number is five greater than the larger number. What are the numbers?a number added to 7 is 25 Luna opened a savings account and deposited 100.00 as principal. The account earns 6% interest, compounded quarterly. What is the balance after 9 years?The chu vi of a circle is 25pi cm. What is the area, in square centimeters? Express your answer in terms of pi