To fix fence wires in a garden, 70m long and 50m wide, Arvind bought metal pipes for bosts. He fixed a post every 5 metres apart. Each post was 2m long. What is total length of the pipes he bought for the posts?

Rakesh has a rectangular field of length 80 m and breadth 60 m. In it, he wants to make a garden 10 m long and 4 m broad at one of the corners and at another corner, he wants to grow flowers in two floor-beds each of size 4 m by 1.5 m. In the remaining part of the field, he wants to apply manures. Find the cost of applying the manures at the rate of Rs 300 per area.

A tank 20 m long, 12 m wide and 8 m deep is to be made of iron sheet. It is open at the top. Determine the cost of iron-sheet, at the rate of Rs. 12.50 per metre, if the sheet is 2.5 m wide.

A tank 20m long, 12m wide and 8m deep is to be made of iron sheet. It is open at the top. Determine the cost of iron-sheet, at the rate of Rs 12.50 per metre, if the sheet is 2.5m wide.

A steel wire of 1.5 m long and of radius 1 mm is attached with a load 3 kg at one end the other end of the wire is fixed it is whirled in a vertical circle with a frequency 2 Hz. Find the elongation of the wire when the weight is at the lowest position Y=2xx10^(11)N//m^(2) and (g=10m//s^(2))

Two identical balls A and B each of mass 0.1 kg are attached to two identical mass less is springs. The spring-mass system is constrained to move inside a right smooth pipe bent in the form of a circle as shown in figure . The pipe is fixed in a horizontal plane. The center of the balls can move in a circle of radius 0.06 m . Each spring has a natural length of 0.06 pi m and force constant 0.1 N//m . Initially, both the balls are displaced by an angle theta = pi//6 radians with respect to diameter PQ of the circle and released from rest. a. Calculate the frequency of oscillation of the ball B. b. What is the total energy of the system ? c. Find the speed of the ball A when A and B are at the two ends of the diameter PQ.

Two identical balls A and B eavh of mass 0.1 kg are attached to two identical mass less is springs. The spring-mass system is consetrained to move inside a right smooth pipe bent in the form of a circle as shown in figure . The pipe is fixed in a horigental plane. The center of the balls can move in a circle of radius 0.06 m . Each spring has a natural length of 0.06 pi m and force constant 0.1 N//m . Initially, both the balls are displaced bu an angle theta = pi//6 dadius withrespect to diameter PQ of the circle and released from rest. a. Calculate the frequency of oscillation of the ball B. b. What is the total energy of the system ? c. Find the speed of the bal A when A and B are at the two ends of the diameter PQ.

A rectangular reservoir is 120 m long and 75\ m wide. At what speed per hour must water flow into it through a square pipe of 20 c m wide so that the water rises by 2. 4\ m\ in\ 18\ hou r sdot

An open rectangular tank 1.5 m wide 2m deep ad 2 m long is half filled with water. It is accelerated horizontally at 3.27m//s^(2) in the direction of its length determine the depth of water at each end of tank.

A string of length 50 cm and mass 12.5 g is fixed at both ends. A pipe closed at one end has a length 85 cm . When the string vibrates in its second overtone and the air column in the pipe in its first. Overtone, they produce a beats frquency of 6 Hz . It is also observed that decreasing teh tension in the string decreaes beats frequency. Neglect the end correction in the pipe and velocity of sound in air is 340 m//s . then the tension in the string is

Two long parallel wires are separated by a distance of 2.50 cm . The force per unit length that each wire exerts on the other is 4.00xx10^-5 N/m , and the wires repel each other. The current in one wire is 0.600A . a. What is the current in the second wire ? b. Are the two currents in the same direction or in opposite direction?