Question

2. If the speed of a man is 45 km per hour, then what is the distance traveled by him in 30
seconds?
a) 275m b)360m c)375 m d) 420 m​

Answer 1

The distance travelled by the man = 375 m

Given :

The speed of a man is 45 km per hour

To find :

The distance traveled by the man in 30 seconds

a) 275 m

b) 360 m

c) 375 m

d) 420 m

Solution :

Step 1 of 2 :

Express speed of the man in m/s.

Speed of the man = 45 km/hr

Now , 1 km = 1000 m and 1 hr = 3600 sec

Thus we get

$\displaystyle \sf 45 \: km/hr$

$\displaystyle \sf = \frac{45 \times 1000}{3600} \: m/s$

$\displaystyle \sf = \frac{45 \times 10}{36} \: m/s$

$\displaystyle \sf = \frac{5 \times 10}{4} \: m/s$

$\displaystyle \sf = \frac{5 \times 5}{2} \: m/s$

$\displaystyle \sf = \frac{25}{2} \: m/s$

$\displaystyle \sf = 12.5 \: m/s$

Step 2 of 2 :

Calculate distance traveled by the man

Time = 30 seconds

∴ Distance traveled by the man

= Speed × Time

= (12.5 × 30) metre

= 375 metre

Hence the correct option is c) 375 m

━━━━━━━━━━━━━━━━

Learn more from Brainly :-

$1.$ A train moves with a speed of 108 km/hr. Its speed in meters per second is

https://brainly.in/question/11591900

2. The displacement of a body at any time t after starting is given by s= 15t-0.4t^2 . The velocity of the body will be 7m/...

https://brainly.in/question/2460554

#SPJ2

Answer 2

The distance traveled by a man is 375 m

Given:

Speed of a man = $45\ km/h$

time to travel = $30\ seconds$

Formula:

$Speed=\frac{Distance}{Time}$

Solution:

Speed of a man = $45\ km/h=45\times \frac{5}{18}\ m/s$

Speed of a man = $12.5\ m/s$

Now,

Distance = Speed x Time

Distance = $12.5\times 30$

Distance = $375\ m$

For more such questions, click on the below links.

If the speed of a body is 5 metre per second, then the time it would take to cover a distance of 6 km is:

https://brainly.in/question/49075584

If a man travels at a speed of 30 km/h, he reaches his destination 10 min late and if he travels at a speed of 42 km/h, he reaches his destination 10 min early. The distance traveled is

https://brainly.in/question/30257961

#SPJ2