Question

compact fluorescent lamps consume one fourth electricity than consumed by incandescent bulbs and cfls last 8 times longer.if the electricity consumed by a household is 820 units at the rate of 4.50 rupees per unit then answer the following questions-
1. how many units will be consumed if all bulbs are changed to CFL
2.840 units
ii. 120 units
iii. 210 units
iv. 205 units
b) The amount to be paid when incandescent bulbs are used is
i. ₹4.50
ii. ₹3690
iii. ₹36900
iv. ₹369
c) What is the ratio of units consumed when incandescent bulbs are used to units consumed when CFLs
are used?
i. 160 : 81
ii. 81 : 160
iii. 1 : 4
iv. 4 : 1

Answer 1

Answer:

compact fluorescent lamps consume one fourth electricity than consumed by incandescent bulbs and cfls last 8 times longer.if the electricity consumed by a household is 820 units at the rate of 4.50 rupees per unit then answer the following questions-

1. how many units will be consumed if all bulbs are changed to CFL

2.840 units

ii. 120 units

iii. 210 units

iv. 205 units

b) The amount to be paid when incandescent bulbs are used is

i. ₹4.50

ii. ₹3690

iii. ₹36900

iv. ₹369

c) What is the ratio of units consumed when incandescent bulbs are used to units consumed when CFLs

are used?

i. 160 : 81

ii. 81 : 160

iii. 1 : 4

iv. 4 : 1