Question

A car moves a distance of 200 m. It covers the first half of
the distance at speed 40 km/h and the second half de
distance at speed v. The average speed is 48 km/h. Find the
value of v
(b) 60 km/h
(a) 56 km/h
(c) 50 km/h
(d) 48 km/h
​

Answer 1

Answer:

The distance covered by car is 200m

At first it used 40 km

Average speed = 48 km

2nd speed = 40 + v =48 km

2

= v = 48 × 2

40

v = 12× 5

v = 60 km/per hour