For the families having no electricity in their house, a Panchayat samity of village Bakultala accepted a plan to offer electric connections, 1200 families in these village have no electric connection in their houses. In comparison to its previous years, it is possible to arrange electricity every year for 75% of the families having no electricity. Find the number of families without electricity after 2 years.

A family pays ? 1000 for electricity on an average in those months in which it does not use a water heater. In the months in which it uses a water heater, the average electricity bill is ? 1240. The cost of using the water heater is ? 8.00 per hour. Find the average number of hours the water heater is used in a day.

A family pays 1000 for electricity on an average in those months in which it does not use a water heater. In the months in which it uses a water heater, the average electricity bill is 1240. The cost of using the water heater is ? 8.00 per hour. Find the average number of hours the water heater is used in a day.

The family pays Rs 1000 for electricity on an average in those months in which it does not use a water heater. In the months in whih it uses a water heater, the average electricity bill is Rs 1240. The cost of using the water heater is Rs 8.00 per hour. Find the average number of hours the water heater is used in a day.

A surevy conduceted on 1800 villages shows that 25% of the total villages have only adequate water supply. 15% of the total number have proper supply proper supply of electricity only. 7% of the total number of villages have only proper education facilities. 12% of the total number of villages have tele-communication services only. 16% of the total number of villages have proper health care services only. 6% of the total number of villages adequate water as well as supply of electricity . 8% of the total number of villages have adequate supplu of water, electricity as well as health care services. 5% of the total number of villages as well as health care services and 6% of the total number of villages have all the facilities . How many villages in all have adequate water supply ?

Two spheres of same metal have radii a and b . They have been connected to a conducting wire. Find the ratio of the electric field intensity upon them.

Two spheres of same metal have radii a and b . They have been connected to a conducting wire. Find the ratio of the electric field intensity upon them.

A parallel plate capacitor is connected to a battery of emf V volts. Now a slab of dielectric constant k=2 is inserted between the plates of capacitor without disconnecting the battery. The electric field between the plates of capacitor after inserting the slab is E= (PV)/(2d) . Find the value of P.

In a village 60% families have 1 cow and, 30% families have 1 buffalo and 15% families have both 1 cow and 1 Buffalo. If there are only 96 families in a village. Find the number of families that does not have any cow or buffalo.

The following are the number of electric bulbs purchased for a lodging house during the first four months of a year