Explanation

The velocity of sound is calculated using the formula:

Velocity=Frequency×Wavelength

Given:

Frequency = 300 Hz

Wavelength = 4 ft

Velocity=300×4=1200 ft/sec

Explanation

In the June 2018 presidential election, Recep Tayyip Erdoğan secured 52.59% of the total votes.

This win confirmed his position as President of Turkey under the new executive presidential system.

Explanation

The Bhutto regime announced its first Educational Policy on 15th March 1972.

It focused on free and universal education, curriculum reforms, and nationalization of private institutions.

Explanation

Zakir Husain Khan served as the third president of India, from 13 May 1967 to 3 May 1969.

He previously served as the governor of Bihar from 1957 to 1962.

Second vice president of India from 1962 to 1967.

He was the first Muslim to hold the office of President in India.

Explanation

 "He was too late to submit the paper."

"To submit" is the correct infinitive form because it fits the context of the sentence.

The sentence implies that he was too late to take action (submit the paper).

Explanation

In passive voice, the object of the active sentence becomes the subject of the passive sentence.

The correct structure of the passive voice with the modal verb "might" in the perfect aspect is:

[Subject] + might have been + past participle + [by + agent].

So, "The insurance money might have been paid in instalments by him" is correctly structured

Explanation

A photoelectric cell works on the photoelectric effect, where light strikes a material and releases electrons.

These released electrons generate an electric current, converting light energy into electrical energy.

Explanation

$$\text{Loss}=\text{Cost Price}-\text{Selling Price}$$ $$= 8000 - 7000 = 1000$$

Explanation

We use the compound interest installment formula to find equal annual payments:

$$P = frac{x}{(1 + r)^1} + frac{x}{(1 + r)^2}$$

Where:

• $P=₹1025$ (debt)

• $r = 5$

• $x$ = annual payment

• Time = 2 years

Substitute values:

​ $$1025 = frac{x}{1.05} + frac{x}{1.1025}$$ $$1025 = x left( frac{1}{1.05} + frac{1}{1.1025} right) = x (0.9524 + 0.9070) = x (1.8594)$$
$$x = frac{1025}{1.8594} ≈ 551.25$$

Explanation

Distance = 3250 km

Time = 65 hours

Average speed of car = Distance / Time

= 3250 / 65

= 50 km/h

Given that the average speed of the bus is 3/5 of the car's speed:

Average speed of bus = (3/5) * 50

= 30 km/h