1980-11-18 — Page 23

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日八十月一十年〇八九一座公年九十六國民中

保持城

市清潔

本月廿二在荃灣大會堂

青年音樂協會辦音樂會 抛垃圾

(+1M+HD - #KIM<SURESHIREX® )

「俠士渡江圖」(彭慕賢作

*E*

(ARKES)

八本月廿四日起在大會立八樓展出。

·陳英雄小妹妹,原本

二期星

及十元。是次音樂由 基踞大會堂裔助演出。

.菜價;五元-七莞

暴行。荃灣大會堂票房

·粤華舉行。港九各通利 伍。書嘉地點:港九各 FINERE RE 紅。二胡齊奕:山鄉 新歌。宓獨奏:映山 巫。笛子獨変:改民

禨--百萬車師過大。 古筝獨奏:名明珠放

胡協驚:程式,$

··OKKA÷SK I

HERE {KNEZTE

太區房及海舉行出售。 是曲如下:院啊路

| DESINEB • B 有少量門岛在荃舞大合

了。加上獨曲・ 下一然袿粹之「座笛」各作 像。至江南德•年

卡西洋赞款樂團與 KE--+88***

您有教僑華頁三第張六第

1一十月十年申庚歷裒

WAH KIU YAT PO

CE

愿

*

35

(上)吳區議書法精披。

〔下右)有爲響法。

是

他

(下左)吳湖帆「山水」。

《集古裔女二遛年肥念股产-本月廿四起致出。)

【本月廿四日起在大會烘八樓展出。

(EBEN BIKE)

著

1981

中學會考試題預習專欄

數學(七)

明德出版社交波提供資料

Mathematics 7

GP Man

MILL & DALE PRESS LTD.

Exercise 3.

Answer all questions in Section A and any six questions in Section B. Section

1. If px2+8x2+qx−2 Ls

divisible by (x+2)(x-1), find the value of p and

In the figure, AXYZ is

inscribed in a circle, T is

作(代近)碧桃馮 「高山廉 三月二十八日本株式

。心中術藝書出版,其

9. The tine for a journey is

reduced by 25 mín by

increasing the average speed

by 5km per hour, a further increase of 5km per hour causes

a further reduction

of 20 min. Find the length of the journey and the original speed.

10. A merchant has 20kg of

tea and 25kg of B ten. Hë makes up two mixtures by blending A and B tea in the ratio 3:1 and 1:4. The first mixture gives a profit of $3 per kg and the second mixture gives $1.5 per kg. Find how many kg of each he should blend, to give the greatest profit.

a point on YZ produced such that LYXZ=120°, LZXT-15° and 12 EXTY-30° Find the ratio of XY:XZ. (Geometry theorem need not be quoted when used.)

In the figure, AB-AC, QB=QP

and ZBAC¿BQP. Prove that

(a) AQBP and AABC are

(b) q, B, P and A are

concyelic, (c) QA/BC.

Зд

Find the values of n if the Requation x(x-1)+

bas equal reots.

2.

Solve the equation

btan x-48in -10. when 0°< x <360°

A is 10% more than Band B

is 20% more than C. What is the percentage of A more than C?

30°

In the figure, a rectangular block resta against an inclined plane OB; AOK is the ground line; 08-2cm. (a) Find (1) ZBAO

(ii) Height of D

above the ground.

(b) Find (i) <CAO

(ii) Height of C

above the ground,

)

15. The first $600 for a man's

income is untaxed and he pays tax at the rate of 38% on the balance.

16

(a) Caloulate the tax

payable on an income of $1500.

(b) If a man receives $1468

after paying tax, calculate his income before taxation.

150 3cm.

In the figure, ABCD is a #gram. AB-3cm, BC=4cm and

Calculate 4ABC=150°,

(a) Area of gram ABCD. (b) length of AC.

(c) BAC

物理

(+)

明德出版社魯榮家提供資料

PHYSICS (7)

W.K.LO,

(MILL & DALE PRESS. LTD.)

Exercise 41 Mechanics

and Propert- ies of Matter

A truck travels along a horizontal straight road, the speed-time graph of its motion is

shown in figure 1.

Speed (mg

figure 1

(11) the acceleration

greatest,

(iii) the kinetic

energy great

(e) Compute the est,

distance travelled by the truck before it

decelerates.

A uniform metal rod AB

80cm long is bent into. a right-angled L-shaped piece as shown in Ligure 2. The wire is hung on a smooth peg P at the point of bend. Find the angle between the 30cm-arm and the vertical when the piece

is in equilibrium.

ire

ญ

ស

3. A wooden block is weigh-

ed in air, in water and in liquid X as shown in figure 3(a), figure 3(b) and figure 3(c) respect- ively.

(Density of water

=1000kgm−3)

O

0

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垃勿清持

圾亂潔城

(v) the density of

liquid. X.

(b) If a lump of metal is attached to the

bottom of the block

and causes the wooden

block to float in water with its upper surface just covered by water as shown in figure 3(d).

A

figure 3(a)

Find the mass of metal

attached if the density of the metal is 8000kgo

A uniform glass tube 40cm long is lowered into the bottom of a

lake and water is found to rise 10cm in the tube If the atmospheric press- ure is 750mmHg, find the depth of water in the lake. (Density of water in the lake=1200kgm density of mercury-

13600kg-3).

H

In the figure, ABCD is a parallelogram with area 72sq.co, H.K are the mid-points of AB, DC respectively, find the

of the shaded region. a+b=c b+c=8_c+a−b

7. If

find ab.c.

In the figure, AB-AC=10cm

the perpendicular from to BC. 18 5/3cm. Find LBAC in degree and in radians.

tion B.

ABCD is a quadrilateral such that AB+CD=AD+BC. Points PQ,R, S are taken on AB, BC, CD, DA respectively such that AP-AS, BP-BQ," QC=CH. Prove. that P, Q, R, S, are coneyclic.

14. By selling eggs at $5 per

dozen, a man gained 20%. The coat price of the eggs rises by 124%. If he sells at the same price as before, find

his new gain percent. By

what percent should he raise hia selling price to gain as Buch as formerly on every dozen?

不隨禮柯多新彩無報請遠 另報拜式采穎色任販就道 收附出印多雜華 § 歡訂近閱 三費送版刷姿誌僑 迎向戶

Time Cin' suc.).

(a) Which stage of the

journey takes the longest time?

(b) During which stage

of the journey does the car travel the greatest distance? During which stage (s) of the journey does the car

travel in uniform

speed?

(d) During which stage

of the journey is (1) the speed greatest,

figure3(a) figure 3(b).

Of

figure 4

In figure 5, a copper block of mass 0.089kg

and an iron block are.

connected by a light cord passing over a pulley and hang in equilibrium when both are completely immersed in water.

figure 3(c)

(a) Calculate

(1) the upthrust on

the block in water, (11) the volume of the

block A,

(111) the relative

density of block

A,

(iv) the upthrust of

the block A in liquid X,

報日僑華閱訂期長請

訂閱電話

5-229081內線3號

figure

mater

Find the mass of the

iron block,

(Relative density of

copper 8.9

iron 7.8)

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