Question

(c)zero(d)142sec/m2.One car moving on a straight road covers one third of thedistance with 20 km/hr and the rest with 60 km/hr. TheAverage speed is(a) 40 km/hr(b)80 km/hr(c) 3246km/hr(d)36 km/hr​

Answer 1

heya...!!!

❤ here is ua answer:(Option D)

❤Explanation:

Assuming the total distance to be 3x.

Time taken by the car to cover one-third of the distance = x/20

Time taken to cover two-thirds of the distance by the car = 2x/60

= x/30 Total time taken by the car

= x/20 + x/30 equals to 5x/60 which is x/12

Average speed obtained= (Total distance travelled)/(Total time taken)

= (3x)/(x/12) = 36 kilometre/hour

hope it helps..!!❤

Answer 2

Step-by-step explanation:

REFER TO THE ATTACHMENT