All categories

3 years ago

If i bike travels 15m in 2 sec, what is its speen in km/h?

Mathematics

2 answers:

Alla [95]3 years ago

5 0

9514 1404 393

Answer:

27 km/h

Step-by-step explanation:

(15 m)/(2 s) = (15 m)/(2 s)×(1 km)/(1000 m)×(3600 s)/(1 h)

= (15×1×3600)/(2×1000×1) km/h = 15×1.8 km/h = 27 km/h

shutvik [7]3 years ago

3 0

Answer:

x=27 km

Step-by-step explanation:

Make an equation 2/.015=3600/x

Multiply 3600 by .015 to get 54

Divide 54 by 2 to get 27.

You might be interested in

A wheel with radius 1 foot makes 1 revolution in 4 seconds. What is the linear velocity, in feet per second, of a point on the e

Alona [7]

In one revolution of the wheel, a point on the edge travels a distance equal to the circumference of the wheel.

The wheel has radius 1 ft, so its circumference is 2π (1 ft) = 2π ft.

Then the point has a linear speed of

(1/4 rev/s) * (2π ft/rev) = 2π/4 ft/s = π/2 ft/s

5 0

3 years ago

Length of a rectangle is 5 cm longer than the width. Four squares are constructed outside the rectangle such that each of the sq

TiliK225 [7]

Answer:

The perimeter of rectangle is $18\ cm$

Step-by-step explanation:

Let

x-----> the length of the rectangle

y----> the width of the rectangle

we know that

$x=y+5$ ----> equation A

$120=xy+2x^{2}+2y^{2}$ ---> equation B (area of the constructed figure)

substitute the equation A in equation B

$120=(y+5)y+2(y+5)^{2}+2y^{2}$

$120=(y+5)y+2(y+5)^{2}+2y^{2}\\ 120=y^{2}+5y+2(y^{2}+10y+25)+2y^{2}\\ 120=y^{2}+5y+2y^{2}+20y+50+2y^{2}\\120=5y^{2}+25y+50\\5y^{2}+25y-70=0$

using a graphing calculator -----> solve the quadratic equation

The solution is

$y=2\ cm$

Find the value of x

$x=y+5 ----> x=2+5=7\ cm$

Find the perimeter of rectangle

$P=2(x+y)=2(7+2)=18\ cm$

4 0

4 years ago

Read 2 more answers

VOLUME help me yall fr please

s2008m [1.1K]

Volume = 71.2 m3

4 0

3 years ago

Read 2 more answers

On the fifth orbit, the space shuttle Freedom was as close as 110 miles from Earth and as far away as 180 miles from Earth. By h

Varvara68 [4.7K]

$180 - 110 = 70$

4 0

3 years ago

Read 2 more answers

10 of 10 answere

sergeinik [125]

The most you can make is 16 because you need a dvd in each prize even though there is still pretzels and popcorn

8 0

3 years ago