The area of a circle is 38.5cm2. Find its diameter [take π=227]
22cm
14cm
7cm
6cm
Correct answer is C
πr2=38.5=r2=38.5r2=38.5×722r=√12.25=3.5diameter=2r=2×3.5=7cm
In the diagram, |PQ| = |PS| Which of the following statements is true?
∠QPS = QRS
|PO| = |RO|
QR||PS
∠PQR=∠PSR
Correct answer is D
No explanation has been provided for this answer.
8.74cm
38.2cm
61.2cm
76.4cm
Correct answer is B
Length of arc = θ360×2πr
50=75360×2×227×r
r=50×360×775×2×22
r=42011
= 38.18 cm ≊ 38.2 cm (3 sig. figs)
5.0cm
6.9cm
10.0cm
20.0cm
Correct answer is D
Area of trapezium = \frac{1}{2} (a + b)h
120 = \frac{1}{2} (5 + 7) \times h
120 = 6h
h = 20 cm
8 hours
6hr 15min
4hr 25min
3 hours
Correct answer is B
Total capacity of the container = 45 liters = 45 x 1000
= 45000 cm^3
Time to fill the container = \frac{45000}{2}
= 22500 seconds
= \frac{22500}{3600}
= 6 hr 15 mins
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