With reference to 'Visible Light Communication' (VLC) technology, which of the following statements is/are correct? 1. VLC uses electromagnetic spectrum wavelengths between 375 and 780 nm. 2. VLC is known as Li-Fi (Light Fidelity). 3. VLC cannot pass through opaque objects. Select the correct answer:

What is the maximum strength of the Lok Sabha as per the Constitution?

The ratio of the length and breadth of a rectangular plot is 5 : 4. If the breadth is 20 meters less than the length, what is the perimeter of the plot?

The ratio of the length of a rod and its shadow is 1:√3. The angle of elevation of the sun is:

If the length of a rectangle is increased in the ratio 4:5 and the breadth is decreased in the ratio 3:2, find the ratio in which the area of the rectangle will change.

The ratio of the length and breadth of a rectangular field is 3 : 2. If the perimeter is 80m, find its area.

If a rectangle's length is doubled and its breadth is halved, what happens to its area?

If a rectangle's length is doubled and its width is halved, what happens to the area?

A train passes a station platform in 36 seconds and a man standing on the platform in 20 seconds. If the speed of the train is 54 km/h, what is the length of the platform?

If a rectangle has a length of 15 cm and a perimeter of 50 cm, what is its width?

The ratio of the length and breadth of a rectangular plot is 7 : 5. If the perimeter is 480 meters, find the area of the plot.

The perimeter of a rectangle is 40 cm. If its length is 12 cm, what is its breadth?

If the length of a rectangle is increased by 20% and its breadth is decreased by 10%, what is the percentage change in its area?

A 240m long train crosses a platform in 20 seconds. If its speed is 72 km/h, what is the length of the platform?

If a rectangle's length is increased by 20% and its breadth is decreased by 10%, what is the net effect on its area?

The tri-service military exercise 'Dweep Shakti', conducted from March 24 to 28, 2026, primarily aimed at strengthening which capabilities?

The ratio of the sides of a triangle is 1/2 : 1/3 : 1/4 and its perimeter is 104 cm. Find the length of the longest side.

The ratio of the sides of a triangle is 1/2 : 1/3 : 1/4 and its perimeter is 104 cm. The length of the longest side is:

What is the maximum strength of the Lok Sabha as provided in the Constitution?

What is the standard length of a marathon race?