Cost of 1 chair is Rs. 214 and cost of one table is Rs. 937, then what is the approximate cost of 6 dozen chairs and 4 dozen table?

?Weight of 13 m long rod = 23.4 kg
? Weight of 1 m long rod = 23.4 / 13 kg
? Weight of 6 m long rod = 23.4 x 6 / 13
= 10.8 kg

No. of pieces = Total length / Length of each piece
= 192/3.2
= 60

Dividing numerator as well as denominator by b, we get
Given Exp. = (3a + 2b) / (3a - 2b) = (3a/b + 2) / (3a/b - 2)
= [ (3 x 4) / 3 + 2 ] / [ (3 x 4)/3 - 2 ]
= (4 + 2) / (4 - 2)
= 3

? ?3ⁿ = 81
? 3^n/2= 3⁴
? n/2 = 4
? n = 8.

Given Exp. = 4 / 7 + {(2q - p) / (2q + p)}
Dividing numerator as well as denominator by q,
Exp = 4/7 + {2-p/q) / (2 + p/q)}
= 4/7 + {(2 - 4/5) / (2 + 4/5)}
= 4/7 + 6/14
= 4/7 + 3/7
=7/7
=1.

? Five dozen = 5 x 12 = 60
? No of toys can be kept in 1 box = 60
? No of toys can be kept in 98 boxes = 60 x 98 = 5880
? 29400 toys can be lifted by = 29400 / 5880 = 5 tempos

Let 80/y = y/20
Then, y ² = 80 x 20 = 1600
? y = ?1600 = 40.

Let (y/21) x (y/189) = 1
Then , y² = 21 x 189 = 21 x 21 x 9
? y = (21 x 3) = 63 .

On dividing 13601 by 86, we get 29 as remainder
? Required number to be subtracted = 29.

Let 392/?x = 28
Then ?x = 392/28 =14
? x = 14² = 196