Question

A car travels at a speed of 60 m/s for first 3 seconds and 40 m/s for the next 2 seconds. The total distance (in m) travelled by the car in those 5 seconds is:

• A. 260

Answer 1

The correct option is A 260
$\text{Distance}=\text{Speed}\times \text{Time}$

The distance travelled in the first 3 seconds:
$d_1=60{\text{m s}}^{-1}\times 3\text{s}$
$d_1=180\text{m}$

The distance travelled in the next 2 seconds:
$d_2=40{\text{m s}}^{-1}\times 2\text{s}$
$d_2=80\text{m}$

Hence, the total distance travelled by the car,
$d=d_1+d_2=180\text{m}+80\text{m}$
$d=260\text{m}$