Question

- Joel and Tom were travelling from Town X to Town Y
which was 210 km apart. Joel set off 1 h 15 min later
than Tom but arrived 15 min earlier. If the average speed
of Tom was 42 km/h, find the average speed of Joel.
(a) 50 km/h (b) 60 km/h (C) 65 km/h (d) 70 km/h​

Answer 1

Answer:

b.60 Km /h

Step-by-step explanation:

Distance = 210 km

average speed of tom = 42 km/hr

time taken by tom = distance over speed = 210 /42 = 5 hrs

But Joe started 1 hr 15 min late and arrived 15 min earlier .

Joee took only 3 hr 30 min ( 5 hrs - 1 hr 15 min -15 min)

30 min =0.5 hr

so 3 hr 30 min = 3.50 hrs

speed of Joel = distance /time

=210 km /3.5

= 60 kmph

speed of Joel = 60 kmph

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