**Mathematics Test II Solution - Page 78**

37. Every seat in a bus was taken and 7 people were standing. At the next stop 15 people got off and 3 got on. How many seats were empty after this stop if everyone was seated?

Let x - be the number of seats

No. of people = x + 7 -15 + 3 No. of empty seats = x - (x - 5)

No. of people = x - 5 No. of empty seats = x - x + 5

**No. of seats = 5 *Ans.**

38. A boy scored 134, 145, and 150 in his first 3 games. What score must he make on his next game so that his average for the four games will be 149?

x - must be score in the fourth game

__x + 134 + 150 + 145__= 149

4

x + 429 = 4 (149)

x + 429 = 596

x = 596 - 429

**x = 167 *Ans.**

39. Angelo can type 9 pages in 12 minutes. How many pages can he type in 8 hours at the same rate?

P - no. of pages :

__P__x

__1 hr__=

__9 pages__

8 hrs 60 mins 12 mins

__P__=

__9__

480 12

P =

__9__(480)

12

= 9 (40)

**360 *Ans.**

40. Girlie starts cleaning the yard at 10 AM and by 11:20, she has finished 4/5 of it. If she continues working at the same rate, at what time will she finish cleaning the yard?

Time elapse from 10 AM to 11:20 AM is 1 hour and 20 minutes which is = 80 minutes.

__4__: 80 minutes =

__1__: x

5 5

__4__x = 80 (

__1__)

5 5

x = 80 (

__1__)

__5__

5 4

= 20 minutes

**therefore, 20 minutes after 11:20 AM is 11:40 AM *Ans.**

Civil Service Reviewer Post 78/159