Hi How to solve the following question:![](\"http://i61.tinypic.com/2isxngo.png\")
http://i61.tinypic.com/2isxngo.png\">
TIA
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RE: Q&A - PSLE Math
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RE: Q&A - PSLE Math
acforfamily:
Hi acforfamily![](\"http://i60.tinypic.com/1zmjbbb.jpg\")
http://i60.tinypic.com/1zmjbbb.jpg\">
htn:
Hi, please help
The figure below is made up of a semicircle, a square and 3 quadrants. The side of the square is 20cm.
For each of the following, use the calculator value of pie to find
a) the area of the shaded part, correct to 2 decimal places, (answer given 1481.96 )
b) the perimeter of the shaded part, correct to 2 decimal places (answer given is 188.50 cm)![](\"http://i58.tinypic.com/2agnub4.png\")
TIA
Thank you for your help. For question b) I still don't understand, why
2 pie X 20 and also plus 1/4 circle?
TIA -
RE: Q&A - PSLE Math
Kangkangteo:
[/quote]acforfamily:
The figure below is made up of a semicircle, a square and 3 quadrants. The side of the square is 20cm.
For each of the following, use the calculator value of pie to find
a) the area of the shaded part, correct to 2 decimal places, (answer given 1481.96 )
b) the perimeter of the shaded part, correct to 2 decimal places (answer given is 188.50 cm)
Move the shade quadrant down to the unshaded quadrant.
Answer will be
A semi-circle (radius 20 cm) +
A big quadrant (radius 40 cm) -
A square (side 20 cm)
TIA
Thank you -
RE: Q&A - PSLE Math
acforfamily:
To find the height of water in the tank,htn:
hi, please help. TIA
A tank measuring 10 cm by 10 cm by 30 cm had 2 identical cuboids in it. Water was flowing into the tank for 5 minutes at a rate of 240 cm3 per minute. Each cuboid had a dimension of 5cm by 5 cm by 10cm.
![](\"http://i58.tinypic.com/2iapjly.png\")
Volume of water / base
Base = base of tank less base of cube
= 10*10 less 5*5
= 75
Volume of water in 5 minutes = 240*5= 1200
Height = 1200 / 75 = 16
Is that the answer?
Thank you -
RE: Q&A - PSLE Math
Ice watch:
htn:
Hi, please help
The figure below is made up of a semicircle, a square and 3 quadrants. The side of the square is 20cm.
For each of the following, use the calculator value of pie to find
a) the area of the shaded part, correct to 2 decimal places, (answer given 1481.96 )
b) the perimeter of the shaded part, correct to 2 decimal places (answer given is 188.50 cm)
TIA![](\"http://i58.tinypic.com/ff8ncj.jpg\")
Thank you -
RE: Q&A - PSLE Math
NGU Learning:
Number of boxes:htn:
Hi please help. TIA
Billy needs to pack as many 4cm wooden cubes as possible into a box measuring 31 cm by 15cm by 22 cm as shown below.
![](\"http://i59.tinypic.com/sykn09.png\")
Step 1. Find number of cubes cut out along the length, breadth & height of box
31 ÷ 4 = 7r3
15 ÷ 4 = 3r3
22 ÷ 4 = 5r2
Answer. Find total number of cubes cut out
7 × 3 × 5 = 105 wooden cubes
Remaining volume:
Step 1. Find volume of wooden box
31 × 15 × 22 = 10230 cubic centimetres
Step 2. Find total volume of wooden cubes cut out
4 × 4 × 4 = 62 cubic centimetres
62 × 105 = 6720 cubic centimetres
Answer. Find remaining volume of box
10230 - 6720 = 3510 cubic centimetres
Thank you -
RE: Q&A - PSLE Math
guest2013:
16??htn:
Hi, please help.
The highest common factor of two numbers is 4 and the lowest common multiple is 48. The smaller number is 12. what is the other number?
TIA
Thank you. -
RE: Q&A - PSLE Math
Hi please help. TIA
Billy needs to pack as many 4cm wooden cubes as possible into a box measuring 31 cm by 15cm by 22 cm as shown below.
-
RE: Q&A - PSLE Math
hi, please help. TIA
A tank measuring 10 cm by 10 cm by 30 cm had 2 identical cuboids in it. Water was flowing into the tank for 5 minutes at a rate of 240 cm3 per minute. Each cuboid had a dimension of 5cm by 5 cm by 10cm.