Johnson's Hardware Store is having a moving sale in which everything in the store is being marked down 20% with an additional 5% discount for paying cash. What will be the net cost of a toaster, paid with cash, marked at $25?
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Answer:
In 60 minutes, minute hand completes 360
0
i.e., one rotation.
⇒ in 1 minute, minute hands completes
60
360
∘
=6
∘
Hence, in 5 minutes the angle covered is is 6×5=30
o
.
The angle of sector formed is 30
o
.
The area swept by the minute hand in 5 minutes=
360
30
×π×14×14
Using π=
7
22
, we get
The area swept by the minute hand in 5 minutes =
3
154
sq. cm
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