ranjankar
ranjankar
About
- Username
- ranjankar
- Joined
- Visits
- 0
- Last Active
- Roles
- Member
Comments
-
A = Pe^rt Continuous Compound Interest Formula where, P = principal amount (initial investment) r = annual interest rate (as a decimal) t = number of years A = amount after time t e stands for the Napier's number (base of the natural l…
-
A = Pe^rt Continuous Compound Interest Formula where, P = principal amount (initial investment) r = annual interest rate (as a decimal) t = number of years A = amount after time t e stands for the Napier's number (base of the natural l…
-
12y +20 +19 = 25y +10 - 13 13y = 42 y = 42/13 ANSWER
-
12y +20 +19 = 25y +10 - 13 13y = 42 y = 42/13 ANSWER
-
Let the amount of 8% salt solution be x grams Amount of 4% salt solution = (400 - x) grams 0.08x + 0.04 ( 400 - x) = 0.05 ( 400) 0.08x + 16 -0.04x = 20 0.04x = 4 x = 4 /0.04 = 100 grams ANSWER a) 300 grams b) 100 grams CHECK 0…
-
Let the amount of 8% salt solution be x grams Amount of 4% salt solution = (400 - x) grams 0.08x + 0.04 ( 400 - x) = 0.05 ( 400) 0.08x + 16 -0.04x = 20 0.04x = 4 x = 4 /0.04 = 100 grams ANSWER a) 300 grams b) 100 grams CHECK 0…
-
Let the no of 27$ tickets bought be x Then the no of 21$ tickets bought will be 30 -x Cost = 27x + 21 ( 30-x) = 696 27x + 630 -21x = 696 6x = 66 x =11 ANSWER 11 ( 27$) and 19 ( 21$)
-
Let the efficiency of first car be x miles per gallon THEN , the efficiency of second car WILL BE ( 70-x) miles per gallon Distance = 35x + 30 ( 70-x) = 2250 35x + 2100 -30x = 2250 5x = 150 x = 30 ANSWER First car = 30 miles per ga…
-
Let the efficiency of first car be x miles per gallon THEN , the efficiency of second car WILL BE ( 70-x) miles per gallon Distance = 35x + 30 ( 70-x) = 2250 35x + 2100 -30x = 2250 5x = 150 x = 30 ANSWER First car = 30 miles per ga…
-
6n^2 - 87n + 180 3 ( 2n^2 - 29n +60) COEFF of n^2 = +2 ( + 2) ( +60) = +120 FIND FACTORS OF +120 which add up to -29 ( COEFF of n) ( -24 ) ( -5) = +120 3 ( 2n^2 -24n -5n +60) 3 ( 2n (n -12) -5( n -12) ) 3 ( 2n -5) ( n -12) …
-
First pipe ALONE = 24 minutes Second pipe ALONE = 30 minutes First pipe ALONE in 1 MINUTE = 1/24 of the tank Second pipe ALONE in 1 MINUTE = 1/30 of the tank TOGETHER in 1 MINUTE = 1/24 +1/30 = 54/720 = 9/120 = 3/40 of the tank TOGE…
-
First pipe ALONE = 24 minutes Second pipe ALONE = 30 minutes First pipe ALONE in 1 MINUTE = 1/24 of the tank Second pipe ALONE in 1 MINUTE = 1/30 of the tank TOGETHER in 1 MINUTE = 1/24 +1/30 = 54/720 = 9/120 = 3/40 of the tank TOGE…
-
1) Let his speed in still air be x mph 200/ (x -50) = 400 / ( x+50) CROSS MULTIPLY 400x - 20000 = 200x + 10000 200x = 30000 x = 150 mph 200 / 100 = 2 hours 400 / 200 = 2 hours 600 /4 = 150 mph ANSWER
-
Perimeter = 2 ( length + width ) 42 = 2 ( x+4 + 2x -7) 21 = 3x -3 3x = 24 x = 8 Length = 12 cm Width = 9 cm ANSWER
-
The problem should read 7x^2 + 16x - 15 7x^2 + 21x - 5x - 15 7x ( x + 3) -5( x + 3) ( 7x - 5) ( x + 3) ANSWER
-
The problem should read 7x^2 + 16x - 15 7x^2 + 21x - 5x - 15 7x ( x + 3) -5( x + 3) ( 7x - 5) ( x + 3) ANSWER
-
Volume of cylinder = area of base X height = pi r^2 h
-
Volume of cylinder = area of base X height = pi r^2 h
-
S = C + rC S = C ( 1 + r) C = S / ( 1 + r) ANSWER
-
One needs to take a mediclaim policy for self & family from one of the PSUs . Take this even if you are covered by group cover in your office. You can take a term plan + critical illness riders from any of the private players. LIC does not …
-
(357 - 50n ) miles ANSWER
-
Let the speed of boat in still waters be x mph and speed of current be y mph UPSTREAM ------------------- Speed = (x-y) mph Speed = distance / time = 10/2 = 5 x- y = 5 .......................(A) DOWNSTREAM --------------------------…
-
East bound train = x mph West bound train = x-10 mph Distance between them = 171 miles 171 = 1.5 ( x + x -10) 2x -10 = 114 2x = 124 x = 62 ANSWER 62 mph and 52 mph CHECK 1.5 ( 62+52) = 1.5 X 114 = 171 miles
-
Let the amount invested at 7.5% be $ 100X THEN, the amount invested at 6% WILL BE $ ( 11800 - 100X ) Interest earned = 7.5X + 0.06 ( 11800 - 100X ) = 786 7.5X + 708 - 6X = 786 1.5X = 78 X = 52 ANSWER $5200 at 7.5% + $6600 at 6%
-
83.33 = 83 & 33/100 = 83 1/3 ANSWER
-
x^2 -19 = 6 ADD 19 x^2 = 25 X = +5 OR -5 ANSWER
-
x^2 -19 = 6 ADD 19 x^2 = 25 X = +5 OR -5 ANSWER
-
1) 6n^2 +3 = 57 6n^2 = 54 n^2 = 9 n = +3 Or -3 ANSWER 2) Bob = x 2x -3 = 5 2x = 8 x = 4 ANSWER Bob = 4 3) Paul = x Mike = 6 = 1/2x 12 = x ANSWER Paul has 12
-
No Answer is 21x^2 +40x - 21
-
Let the speed of train be x meters / minute THEN the speed of runner is 3x meters/ minute Time taken by runner to reach the front = 100 /2x minutes Time taken by runner to reach the back = 100/ 4x minutes Total time = 50/x + 25/x …