Two towns `Aa n dB` are 60 km apart. A school is to be built to serve 150 students in town `Aa n d50` students in town `Bdot` If the total distance to be travelled by 200 students is to be as small as possible, then the school should be built at town B town A 45 km from town A 45 km from town B

Two towns Aa n dB are 60 km apart. A school is to be built to serve 150 students in town Aa n d50 students in town Bdot If the total distance to be travelled by 200 students is to be as small as possible, then the school should be built at (a)town B (b)town A (c)45 km from town A (d)45 km from town B

A small town with a demand of 800 kW of power at 220 V is situated 15 km away from an electric plant generating power at 440 V. The resistance of the two wire line carrying power is 0.5Omega . km^-1 . The line gets power from the line through a 4000-220 V step-down transformer at a substation in the town. Characterise the step-up transformer at the plant.

A small town with a demand of 800 kW of power at 220 V is situated 15 km away from an electric plant generating power at 440 V. The resistance of the two wire line carrying power is 0.5Omega . km^-1 . The line gets power from the line through a 4000-220 V step-down transformer at a substation in the town. How much power must the plant supply, assuming there is negligible power loss due to leakage.

A small town with a demand of 800 kW of power at 220 V is situated 15 km away from an electric plant generating power at 440 V. The resistance of the two wire line carrying power is 0.5Omega . km^-1 . The line gets power from the line through a 4000-220 V step-down transformer at a substation in the town. Estimate the line power loss in the form of heat?

A factory D is to be connected by a road with a straight railway line on which a town A is situated. The distance D B of the factory to the railway line is 5sqrt(3)k mdot Length A B of the railway line is 20km. Freight charges on the road are twice the charges on the railway. The point P(A P < A B) on the railway line should the road D P be connected so as to ensure minimum freight charges from the factory to the town is B P=5k m (b) A P=5k m B P=7. 5k m (d) none of these

Two towns A and B are connected by a regular bus service with a bus leaving in either direction every T minutes. A man cycling with a speed of 20 "km.h"^(-1) in the direction A to B notices that bus goes past him every 18 min in the direction of his motion, and every 6 min in the opposite direction. What is the period T of the bus service and with what speed (assumed constant ) do the buses ply on the road?

The teachers of Geeta's school took the students on a study trip to a power generating station, located nearly 200km away from the city. The teacher explained that electrical energy is transmitted over such a long distance to their city. In the form of alternating current (ac) raised to a high voltage. At the receiving end in the city, the voltage is reduced to operate the devices. As a result, the power loss is reduced. Geeta listened to the teacher and asked questions about how the ac is converted to a higher or lower voltage. Write two values each shown by the teachers and geeta,

The teachers of Geeta's school took the students on a study trip to a power generating station, located nearly 200km away from the city. The teacher explained that electrical energy is transmitted over such a long distance to their city. In the form of alternating current (ac) raised to a high voltage. At the receiving end in the city, the voltage is reduced to operate the devices. As a result, the power loss is reduced. Geeta listened to the teacher and asked questions about how the ac is converted to a higher or lower voltage. Explain with an example , how power loss is reduced if the energy is transmitted over long distances as an alternating current rather than a direct current .