Correct Answer: Rs. 67,760

Solution : Given, The outer circumference of the circular race track = 528 metre
Width of track = 14 m
Cost of levelling = Rs. 10 per sq. metre
Let the outer radius be $r$.
So, $2 \pi r = 528$
⇒ $r=\frac{528\times 7}{2\times 22}$
⇒

Correct Answer: 32.75

Solution : Given: A boy found that the average of 20 numbers is 35.
When he writes a number '61' instead of '16'.
Difference = 61 – 16 = 45
$\therefore$ Correct average = 35 – $\frac{45}{20}$ = 35 – 2.25 = 32.75
Hence, the correct answer

Correct Answer: Wheat

Solution : The correct option is Wheat.

Guard cells of monocotyledonous or monocot plants such as wheat are generally elongated or dumbbell-like. Guard cells in monocots are often placed parallel to one another within the stomata. The presence of kidney-shaped guard cells is a distinguishing trait of

Correct Answer: Mountaineering

Solution : The correct answer is the third option.

The correct spelling is "mountaineering". The word "mountaineering" refers to the sport or activity of climbing mountains, especially as a recreational pursuit.

Therefore, the correct answer is mountaineering.

Correct Answer: (2)

Solution : The error lies in the first part of the sentence.

The speaker is talking about his friends, which is a case of possession. So in this case, has should be used instead of is having.

Therefore, the correct sentence is: He has many friends here.

Correct Answer: 15

Solution :
The angle subtended by any chord of a circle at the centre of a circle is twice the angle subtended at the major arc by the same chord.
$\angle$BAC = $\frac{1}{2} \angle$BPC
= $\frac{1}{2}×30^{\circ}$
= $15^{\circ}$
Hence, the correct answer is 15.

Correct Answer: 3

Solution : The correct option is the third option.

Explanation: 

The sentence structure in the third option suggests a polite request. Moreover, "can" and "able" cannot be used together, as "able" itself means a capacity to do something, which replaces "can" very often.

The other options have

Correct Answer: Rs. 6615

Solution : Let the instalment value be Rs. $P$.
According to the concept,
$\frac{x}{(1+\frac{R}{100})} +\frac{x}{(1+\frac{R}{100})^2} +...........+\frac{x}{(1+\frac{R}{100})^n} =A$
where $x$ is the instalment value, 'A' is the total amount that was created in instalments and n is the number of instalments.
$P(1+\frac{5}{100})+P=12300(1+\frac{5}{100})^{2}$
⇒ $1.05P+P=12300×\frac{21}{20}×\frac{21}{20}$
⇒ $2.05P=13560.75$
⇒

Correct Answer: $37.5$%

Solution : A grocer sells rice at 10% profit.
Let the cost price of the rice be 100.
Selling price = 100 + 10 = 110
He uses weights that are 20% less than the market weight.
Original cost of that rice = 100 – 20 =

Correct Answer: Godavari

Solution : The correct answer is Godavari

The Dakshin Ganga is another name for the River Godavari. The Godavari River spans 1500 kilometres. Godavari River rises in the Nasik district of Maharashtra, on the Western Ghats' foothills. With flowing into the Bay of Bengal, the Godavari River