Question

a car does a journey in 10 h , the first half at 21 km per hour , and the rest at 24 km per hour. the distance travelled by the car is ..​

Answer 1

Answer:

225km

Step-by-step explanation:

Total time of journey = 10 hours

first half of journey = second half of journey

10/2 = 5 hours

Now,

speed = distance travelled / time taken

since we already know speed and time taken, we can put that equation in the form of

Distance=speed*time taken

since the journey has two halves with different speed,

total distance = distance travelled in first half + distance travelled in second half

total distance = (21 * 5) + (24 * 5)

= 105. + 120

=. 225 kms

Therefore,

total distance = 225 kms