Question

A car travels 8 km in the first quarter of an hour, 6 km in the second quarter and
16 km in the third quarter. The average speed of the car in km per hour over the
entire journey is
(A) 30 (B) 36
(C) 40 (D) 24

Answer 1

answer is option (c)
you can see explanation in figure
hope it helps you.....................and please mark this answer as brainliest because I want to gain a new rank
please

Answer 2

Let me clear one thing first, quarter here means 1/4hr

we divide 1 in four parts is a quarter

So for the first quarter T1 = 1/4 hr and D1 = 8 km, S1 = D1/T1 = 32 km/hr

for Second Quarter T2 = 1/4 hr and D2  = 6 km, S2 = D2/T2 = 24 km/hr

for third quarter T3 = 1/4 hr and D3 = 16 km , S3 = D3/T3 = 64 km/hr

Average Speed = (S1 + S2 + S3)/3

=  (32 + 24 + 64)/3

=40 km/hr

If there'll be any  confusion regarding the quarter part at the start you can put it up on the comment box

Happy Learning :)