Question

An electric iron draws a current of 15 A from a 220 V supply, What is the cost of using iron for 30 min everyday for 15 days if the cost of unit (1 unit =1 kWhr) is 2 rupees ? 

A

Rs 49.5

B

Rs 60

C

Rs 40

D

Rs 10

Medium
NTSE

Solution

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Correct option is
A

Rs 49.5

As we know that power(P)=vI
so P=15220=3300 watt
cost per unit=2 rupees 
therefore,=49.5 rupees.

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