Question

A car moves with a speed of 40 km/h for 15 minutes and then with with a speed of 60 km/h for the next 15 minutes. The total distance covered by the car is_
(i) 100km
(ii) 25 km
(iii) 15 km
(iv) 10 km
(v) None of these

Answer 1

Answer:

i

Explanation:

40 km/h for 15 min then a speed of 60 km /h for the next 15minuted.

first 15 minutes 40km/h

second 15 minutes 60 km/h

total distance :- 40+60=100 km/h

Answer 2

Answer:

b) 25 km is the Right answer

Explanation:

first of all we find distance for the first 15 minutes

d=speed× time

d=40 km/hr×15×1/60 hr

d=10 km.

and next distance for 15 minutes

d= speed×time

d=60km/hr×15×1/60 hr

d=15km

total distance covered = sum of total distance covered in given time

=15+10

=25 km.