Question

A train travels at a speed of 120km/hr. If distance travelled is 240 m, find time taken in hours​

Answer 1

» Given:

speed of train = 120km/hr

distance travelled = 240 m

» To find:

time taken in hours.

» Solution

→ 1 km = 1000m

→ 240m = $\frac{240}{1000} = \frac{6}{25}km$

${\pink{\boxed{speed = \frac{distance}{time}}}}$

→ by putting values

speed = 120km/hr , distance = $\frac{6}{25}$

→ $120 = \frac{6}{25} \div t \\ \\ \\ 120 = \frac{6}{25t}\\ \\ \\ by\:cross\: multiplication\\ \\ \\ 120 \times 25t = 6 \\ \\ \\ t = \frac{6}{120\times25}\\ \\ \\ t = 0.002\: hours \\ \\ \\ {\pink{\boxed{\therefore\:t = 0.002 \:hour}}}$

★Additional Information -

Difference between velocity and speed

$\begin{tabular}{c | l}\bf Velocity & \bf Speed \\\cline{1-2}1. It is a Vector quantity. &1. It is a scalar quantity. \\2. Velocity is equal to & 2. Speed is equal to distance upon time.\\displacement upon time & \\3. Velocity can be zero or negative. & 3. Speed can never be zero or negative.\\4. Si unit - m/s & 4. Si unit - m/s \\\end{tabular}$

Answer 2

Answer:

hi

answer is 0.002 hours

Explanation:

we want to calculate time

so we will apply formula

speed=distance/time

note--- we will consider 240m as 0.24km

then using system of equations we can solve the answer

this is the correct explanation

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