Question

3. A car travels a distance of 15 km in 20 minutes. Find the speed of the car in (a)km/h. (b)m/sec

Answer 1

Answer:

Here is your answer

Given:- 1)Distance-15 Km

2)Time- 20 minutes

To find:- Speed of car a)km/h b)m/sec

Speed = 15÷20/60 hr

= 15×60÷20

a) =45 km/h or kmh^-1

b) 15×1000m÷20×60 sec

=12.5 m/s or ms^-1

hope it's helpful

Answer 2

Answer

Given :-

• Distance = 15 km
• Time = 20 min

To find :-

Speed in

• km/hr
• m/s

Solution :-

We know,

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

• s = 15 km
• t = 20 min = 20/60 he

Speed in km/hr

$\sf Speed = \frac{15}{ \frac{20}{60} }$

$\sf = \frac{15 \times \cancel{60}}{ \cancel{ 20}} [tex]\sf = 15 \times 3$

$\sf\purple{ = 45 km/hr}$

Speed in m/s

$\boxed{\sf 1 km/hr = \frac{5}{18} m/s}$

$\sf 45 km/hr = \frac{5}{ \cancel {18}} \times \cancel{45}$

$\sf = \frac{5}{2} \times 5$

$\sf = \frac{25}{2}$

$\sf\purple{ = 12.5 m/s}$