Question

Calculate the electricity bill amount for a month of 31 days, if the following devices are used as
specified:
(a) 3 bulbs of 40 W for 6 hours.
(b) A TV of 120 W for 6 hours.
Give the rate of electricity is Rupees 2.50 per unit.​

Answer 1

Answer:

Explanation:

.Total cost of electricity=power rating(in KWh)×time (in hrs)×no. of devices×cost per 1 unit×no. of days

=> Cost=0.4×6×3×2.5×31

=0.72×2.5×31

= Rs. 55.80

b.Cost=0.05×4×8×2.5×31

=Rs. 124.0

NOTE

Same equation is used in the questions a and b.

Answer 2

Answer:

the process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a by-product.