Question

A goods truck travelling at 48km per hour covers a distance in 6 hours. If the speed of the truck decreases to 36km per hour, in how many hours will it cover the distance​

Answer 1

• 
  `\sf 8 \: hours`

Explanation:

A goods truck travelling at 48km per hour covers a distance in 6 hours

• Speed = 48 km/hr
• Time = 6 hours.

Formula used :

Distance = Speed × time

= 48 × 6

= 288 km

If the speed of the truck decreases to 36km per hour.

• Speed = 36 km/hr
• Distance = 288 km

Distance = Speed × time

288 = 36 × time

time = 288/36

time = 8 hours

Answer 2

• 8 hours

--------------------

The distance is:

• distance = speed × time

Substitute values:

• distance = 48 × 6
• distance = 288 km

Now, using same formula, find the time with the decreased speed:

• time = distance / speed

Substitute values:

• time = 288 / 36
• time = 8 hours