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bulgar [2K]
3 years ago
15

learning task 2:read and analyze the given problem below on a sheet of paper.in a classroom there are five 20 -watt fluorescent

lamps and four 50 watt electric fans operating for 10 hours in a regular school day​
Mathematics
1 answer:
tigry1 [53]3 years ago
8 0

Answer:

15kWh in 5 days

Step-by-step explanation:

Given

Let

L \to Lamp\ \ \ F \to Fan

L = 20W

n(L) = 5

F = 50W

n(F) = 4

t = 10 ---- Time

Required

Total energy consumed in 5 days

For the lamps, we have:

Calculate the energy consumed by the lamps in a day.

For 1 lamp, we have:

L = 20W

For 5, we have:

5L = 5 * 20W

5L = 100W

Convert to kilowatt

5L = \frac{100W}{1000}

5L = 0.1KW

In 1 day, the 5 bulbs use a total energy of:

Daily\ Energy = Power * Time

Daily\ Energy = 0.1KW * 10h

Daily\ Energy = 1KWh

For 5 days, the energy is:

Energy = 5 * 1KWh

Energy = 5KWh

For the fans, we have:

Calculate the energy consumed by the fans in a day.

For 1 fan , we have:

F = 50W

For 4, we have:

4F = 4*50W

4F = 200W

Convert to kilowatt

4F = \frac{200W}{1000}

4F = 0.2kW

In 1 day, the 4 fans will use a total energy of:

Daily\ Energy = Power * Time

Daily\ Energy= 0.2kW * 10h

Daily\ Energy= 2kWh

For 5 days, the energy is:

Energy= 5 * 2kWh

Energy= 10kWh

So, we have:

Energy = 5KWh ------ Lamps

Energy= 10kWh ----- Fans

The total energy used is:

Total = 5kWh + 10kWh

Total = 15kWh

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