Find y in
the figure below;

__Solution__
According to
rectangle properties of a circle

(PX)(XJ) = (HX)(XK)

(4)(y) = (8)(10)

4y = 80

__4y__=

__80__

4 4

y = 20

Hence y = 20
cm

__TRY THIS……….__
Find

**a**in the figure below;
Find y in
the figure below;

According to
rectangle properties of a circle

(PX)(XJ) = (HX)(XK)

(4)(y) = (8)(10)

4y = 80

4 4

y = 20

Hence y = 20
cm

Find **a** in
the figure below;

Salma
invested a certain amount of money in a bank which gives an interest rate of
10% compounded annually. How much did she invest at the start if she got 5000
sh at the end of 2 years?

n=2, t=1,
R=10%, A_{2}=5000, P=?

A_{n}
= P(1 + ^{RT}/100)^{n}

A_{2}
= P(1 + ^{(10x1)}/100)^{2}

A_{2}
= P(1 + ^{10}/100)^{2}

A_{2}
= P(^{100}/100 + ^{10}/100)^{2}

A_{2}
= P(^{110}/100)^{2 } But
A_{2}=5000,

5000 =
P(1.1)^{2 }

5000 = 1.21P

1.21 1.21

1.21

P = 4132.23 (to
2 d.p.)

Salome
invested a certain amount of money in a bank which gives an interest rate of 5%
compounded annually. How much did she invest at the start if she got 12,000 sh
at the end of 2 years?

Ashish
deposited the amount of 20,000/= in a bank for 3 years and got a profit of 7200/=.
Find the interest rate?

I = 7200/=,
P = 20,000/=, T = 3 years, R = ?

I =__ PRT__

100

7200 = __20,000 x R x 3__

100

7200 = __20,0__~~00~~ x R x 3

1~~00~~

7200 = 200 x R x 3

7200 = 600R

Sonali
deposited the amount of 30,000/= in a bank for 6 years and got a profit of
2700/=. Find the interest rate?

Change ^{13}^{∏}/2 radians into degrees.

Ó¨ = __180__^{0 }x^{
}s but s = ^{13}^{∏}/2

∏

Ó¨ = __180__^{0 }x ^{ }13__∏__

∏
2

Ó¨ = ^{90}__180__^{ }x ^{ }13__∏__

Ó¨ = 90^{0 }x 13

Ó¨ = 1170^{0}

Hence ^{13}^{∏}/2
radian is equal to 1170^{0}.

Change ^{7}^{∏}/10 radians into degrees.

Find the
length of an arc if the radius of the circle is 60cm.

L = __∏____r__

180^{0}

L = ∏ x __ 60__

180^{0}

L = __∏ __cm

3

Find the
length of an arc if the radius of the circle is 3.6cm.

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