Question

(d) Ryan covered a distance of 42 km in 3 hrs and a further distance of 44 km in 4 hrs.
Find his average speed.
(e) A train runs for 3 hours at a speed of 55 km/h and for the next 2 hours at a speed of
65 km/h. Find the average speed of the train for the 5 hours journey.
(f)Jack earns $ 100 on the first day, S 60 on the second day, S 150 on the third day, S 80
on the fourth day and S 90 on the fifth day. What is his average earning?
(g) Sam scored 98, 25, 105, 62 and 65 runs in 5 matches. What was the average score per match?

Answer 1

Step-by-step explanation:

(d)Hence, the average speed is 12.29 km/hr.

John covered a distance of 42 km in 3 hrs and a further distance of 44 km in 4 hrs

(e)3 hrs*55km/hr= 165 km.

(f) average = sum of all earnings \ total number of working days

here he earned for five days so he worked for five days......

Average = (100+60+150+80+90)/5

=140/5

= 96