Question

A bullet train travel at the speed of 365 km/h.In august 2001, singapore's national record for the men's 100 m sprint was set at 10.37 sec .How many times is a bullet train as fast as the fastest singaporean sprinter?

Answer 1

Answer:

Therefore bullet train is 10.5 times as fast as the fastest Singaporean sprinter.

Step-by-step explanation:

Given that,

A bullet train travels at the speed off 365 km/h.

365 km/h

$=\frac{365\ km}{h}$

$=\frac{365\times 1000 \ m}{3600 \ s}$    [ ∵1 km= 1000 m and 1 h = 3600 s]

$=\frac {365 \times 5}{18}$ m/s

We know that,

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

Singapore's national record for the men's 100 m sprint was set at 10.37 sec.

The speed of Singaporean sprinter is

$=\frac{100 \ m}{10.37\ s}$

Now,

$\frac{\textrm{Sped of bullet train}}{\textrm{Sped of Singaporean sprinter}}$

$=\frac{\frac{365\times5}{18}}{\frac{100}{10.37}}$

$=\frac{365\times 5\times 10.37}{100\times 18}$

=10.5

Therefore bullet train is 10.5 times as fast as the fastest Singaporean sprinter.