Explanation

Given (a+b) = -2 

Taking cube on both sides, we have (a+b)3=(-2)3

(a+b)3= -8

Explanation

area of the first carpet = 8m (3m) = 24 square meters 

area of the second carpet = 12m (6m) = 72 sq.m

if the cost of 24 sqm carpet = 6288

cost of 72sqm =?

cost = 72 (6288/24)

= 3 (6288)

= Rs 18864

ND16-3-2023

Explanation

Let AC be the ladder and BC be the wall . Then,

In right $△$ ABC,

$A{C}^2=A{B}^2+B{C}^2$

$A{C}^2=(2.5{)}^2+(6{)}^2$

$A{C}^2=\mathrm{42.25mama}$

$AC=6.5m$

Hence, the length of ladder is 6.5 m.

Explanation

 the average of the data is also known as the arithmetic mean.

Explanation

The formula for compound interest is:

A = P(1 + r/100)ⁿ

A = Amount

P = Principal

r = rate of interest

n = conversion period

In the given problem statement :

P = Rs. 1,00,000

r = 5%

n = 6 months

(i) Interest for six months

A = 1,00,000(1 + 5/100)¹

= 1,00,000(1 + 0.05)

= 1,00,000(1.05)

= 1,05,000

Interest for six months = 1,05,000 - 1,00,000

= Rs.5000

(ii) Amount for six Months = Rs. 1,05,000

(iii) Interest for next six months

A = 1,05,000(1 + 5/100)

= 1,05,000(1.05)

= 1,10,250

Interest for next six months = Rs. 1,10,250 - Rs. 1,10,000

= Rs. 5,250

(iv) Amount for One year = Rs. 1,10,250

Explanation

Ethnography is a method that is commonly used in qualitative research.

This type of research involves the study of a culture or group of people, usually through fieldwork.

ND5-09-2023

Explanation

In the above sequence, 200 is added to every digit 

as 

140 + 200 = 340

340 + 200 = 540

540 + 200 = 740

730 + 200 = 940

940 + 200 =1140

so the 730 is wrong, the correct sequence is 740

ND16-3-2023

Explanation

ND16-3-2023

Explanation

Explanation

Diameter of car wheel is 84 cm

Circumference of the wheel = 2*pi*r

= 2*22*.42/7

= 2.64 meter

Speed of the car is 72 kmph

Speed in m/sec is 72*5/18 = 20 m/sec

Distance covered in 11 minutes = 20*11*60 = 13200 meter

Number of revolutions in 11 minutes = distance covered in 11 minutes / circumference of the wheel

= 13200/2.64

= 5000 revolutions