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Could anyone help me with this question? Thanks in advance.

iwork:

EC72:

Need help with the following question. Thanks in advance.


The length of a rectangle is 20 m, correct to the nearest metre. If the area of the field is 332m2, correct to the nearest square metre, find the least possible breadth of the field, giving your answer correct to 3 significant figures.

Area = Length x Breadth

Breadth = Area / Length

Breadth to be the least, then Area must be the least and Length the highest.

So Area = 331.5 m2 and Length = 20.4 m.

And you can work out the Breadth.

:thankyou:

Need help with the following question. Thanks in advance.


The length of a rectangle is 20 m, correct to the nearest metre. If the area of the field is 332m2, correct to the nearest square metre, find the least possible breadth of the field, giving your answer correct to 3 significant figures.

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Can someone help me with bii) ? Thanks in advance.

Dan and Ellen started jogging at the same time along the route shown below. Both did not change their speeds throughout. after 35 min, Dan was at the halfway point and Ellen was 300 metres behind. Dan reached the end point 5 min before Ellen. What was the distance of the route?

Kangkangteo:

EC72:

[quote=\"EC72\"]http://i62.tinypic.com/34j2niu.jpg\">

Need help with this question. Thank you in advance.

38/2 = 19

19 x 50 = 950

950 x 100 = 95000

50/2 = 25

38 x 3.14 x 25 x 25 =74575

95000 - 74575 = 20425

a) The area of footpath not covered by tiles is 20425 sq cm.

19 - 2 = 17

17 x 50 x 2 = 1700

b) The perimeter of the grass patch is 1700 cm.[/quote] :thankyou: Kangkangteo

EC72:

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Need help with this question. Thank you in advance.

sushi88:

EC72:

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0.9m = 90cm
Each breadth = 45cm
4 breadths = 45 x 4 = 180cm
let the length of block be u.
Equate the total height of cupboard from both arrangements,
3u+42=180+u+10
2u = 148
u=74

(a) Gap = 90-74 = 16cm
(b) Height of cupboard = 74x3+42 = 264 = 2.64m
Check in arrangement B: 180+10+74 = 264cm

:thankyou: sushi88!

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