Question

A car travels 10km at the speed of 50 km/hr and other 10 km at the speed of 100km/hr . Find the average speed

Answer 1

Answer:

Given:

A car travels 10 km for 50 km/hr and 10 km for 100 km/hr.

To find:

Average speed of car

Concept:

Average speed is the ratio of total distance to total time taken to cover the distance.

Calculation:

Average speed

$= \frac{10 + 10}{ \frac{10}{50} + \frac{10}{100} }$

$= \frac{20}{ \frac{1}{5} + \frac{1}{10} }$

$= \frac{20}{ \frac{2 + 1}{10} }$

$= \frac{200}{3}$

$= 66.67 \: m {s}^{ - 1}$

So final answer is :

Average speed = 66.67 m/s.

Answer 2

$\huge{\orange{\underline{\red{\mathscr{GIVEN:-}}}}}$

A car travels 10km at the speed of 50 km/hr and other 10 km at the speed of 100km/hr.

$\huge{\orange{\underline{\red{\mathscr{FIND:-}}}}}$

AVERAGE SPEED.

$\huge{\orange{\underline{\red{\mathscr{ANSWER:-}}}}}$

$\frac{10 + 10}{ \frac{10}{50} + \frac{10}{100} } \\ = \frac{20}{ \frac{1}{5} + \frac{1}{10} } \\ = \frac{20}{5 \times \frac{1}{5} + 5 \times \frac{1 }{10} } ....(both \: \: side \: \: multiply \: \: by \: 5) \\ = = \frac{20}{ 1 + 2} \\ = \frac{20}{3} \\ = 6.6ms {}^{ - 1}$

AVERAGE SPEED IS 6.6m/s.

$\huge{\orange{\underline{\red{\mathscr{THANKS.}}}}}$