IGCSE Mathematics Paper-1: Specimen Questions with Answers 70 - 72 of 175

Question number: 70

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Short Answer Question▾

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(a) Find the value of y when .

(b) Make r the subject of the formula.

Explanation

Here, equation is where,

(a)

(b)

Question number: 71

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Short Answer Question▾

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(a) The surface area of the earth is . Write this number to 3 significant digits.

(b) 72.2 % of the surface area of the earth is water. Calculate the area of water.

Explanation

Here,

(a) The surface area of the earth is

  • So, correct it to 3 significant digits we will get: because after 0 there is 1 which is less than 5, so 0 will remain same.

(b) 72.2 % of the surface area of the earth is water.

So, here surface area 100 %= 510 million

Then 72.2 %=?

So, surface area of water on earth which is sphere = .

So, for area of water on earth is:

Question number: 72

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Essay Question▾

Describe in Detail

In a Hospital there are many types of the members and No. of members, which are shown in the table below.

Types of members and No. of members

Showing the types of members and number of members in a hospital

Types of members

No. of Members

Doctors

25

Nurses

50

Peons

35

Patients

78

Draw a bar chart below to show this data. Show your scale on the vertical axis and label the bars.

Explanation

{"chart":{"plotBackgroundColor":null,"plotShadow":true,"backgroundColor":"transparent","width":600},"title":{"text":"Types versus the number of members"},"tooltip":{"pointFormat":"{series.name}: {point.y}"},"credits":{"enabled":false},"xAxis":{"categories":["Doctors"," Nurses"," Peons"," Patients"],"title":{"text":"Types of members"}},"yAxis":{"type":"linear","title":{"text":"No. of members"}},"plotOptions":{"series":{"allowPointSelect":true,"cursor":"pointer"}},"legend":{"floating":true,"backgroundColor":"white","borderColor":"silver","borderWidth":1,"shadow":true},"series":[{"type":"column","name":"Number of members versus type of members","data":[25,50,35,78],"colors":[{"linearGradient":{"x1":0,"y1":0,"x2":0,"y2":1},"stops":[[0,"#7cb5ec"],[1,"rgb(48,105,160)"]]},{"linearGradient":{"x1":0,"y1":0,"x2":0,"y2":1},"stops":[[0,"#434348"],[1,"rgb(0,0,0)"]]},{"linearGradient":{"x1":0,"y1":0,"x2":0,"y2":1},"stops":[[0,"#90ed7d"],[1,"rgb(68,161,49)"]]},{"linearGradient":{"x1":0,"y1":0,"x2":0,"y2":1},"stops":[[0,"#f7a35c"],[1,"rgb(171,87,16)"]]},{"linearGradient":{"x1":0,"y1":0,"x2":0,"y2":1},"stops":[[0,"#8085e9"],[1,"rgb(52,57,157)"]]},{"linearGradient":{"x1":0,"y1":0,"x2":0,"y2":1},"stops":[[0,"#f15c80"],[1,"rgb(165,16,52)"]]},{"linearGradient":{"x1":0,"y1":0,"x2":0,"y2":1},"stops":[[0,"#e4d354"],[1,"rgb(152,135,8)"]]},{"linearGradient":{"x1":0,"y1":0,"x2":0,"y2":1},"stops":[[0,"#2b908f"],[1,"rgb(0,68,67)"]]},{"linearGradient":{"x1":0,"y1":0,"x2":0,"y2":1},"stops":[[0,"#f45b5b"],[1,"rgb(168,15,15)"]]},{"linearGradient":{"x1":0,"y1":0,"x2":0,"y2":1},"stops":[[0,"#91e8e1"],[1,"rgb(69,156,149)"]]}]}]}
Created with Highcharts 4.1. 9Types of membersNo. of membersTypes versus the number of membersNumber of members versus type of membersDoctors Nurses Peons Patients020406080100 PatientsNumber of members versus type of members: 78