A lending library has a fixed charge for the first three days and an additional charge for each day thereafter. Saritha paid Rs 27 for a book kept for seven days, while Susy paid Rs 21 for the book she kept for five days. Find the fixed charge and the charge for each extra day.
A boat goes 30 km upstream and 44 km downstream in 10 hours. In 13 hours, it can go 40 km upstream and 55 km downstream.Ddetermine the speed of the stream and that of boat in water.
Solve by cross -multiplication method : x+y = a+b, ax-by = a2-b2
The sum of the digits of a two digit number is 12. The number obtained by interchanging the two digits exceeds the given number by 18. FInd the number.
how do i find it ??
'A' takes 3 hours more than 'B' to walk a distance of 30km. But, if 'A' doubles his pace he is ahead of 'B' by 1.5 hrs. Find the speed of 'A' and 'B'?
solve the following simultaneous equations:
(i) 3/rootx+4/rooty=17/6 ; 5/rootx-6/rooty=1/2
(ii) 2(3x-y)=5xy ; 2(x=3y)=5xy (x is not equal to 0,y is not equal to 0)
Solve (a-b)x + (a+b)y = asquare - 2ab - b square and (a+b)(x+y) = a square +b square.
after covering a distance of 30 km with a uniform speed there is some defect in a train engine and therefore; its speed is reduced to 45 of its orignal speed.consequently, the train reaches is destination late by 45 minutes.Had it happened after covering 18 kilometers more, the train would have reached 9 minutes earlier.Find the speed of the train and the distance of the journey. HURRRRY HURRRY GIVE THE ANSWER
a boat covers 32km upstream and 36km downstream in 7hours. also it covers 40km upstream and 48km downstream in 9hours. find the speed of the boat in still water and that of stream?
For what values of a and b does the following pair of linear equations has a infinite number of solutions: 2x+3y=7; a(x+y)-b(x-y)=3a+b-2.
A part of monthly hostel charges is fixed and the remaining depends on the number of days one has taken food in the mess. When a student A takes food for 20 days she has to pay Rs. 1000 as hostel charges whereas a student B,who takes food for 26 days,pays Rs. 1180 as hostel charges. Find the fixed charges and the cost of food per day.
b/a x + a/b y = a2 + b2 , x+y =2ab solve for x and y
RD Sharma solution
A man walks a certain distance with certain speed. If he walks 1/2 km an hour faster, he takes 1 hour
A lending library has a fixed charge for the first three days and an additional charge for each day thereafter. Saritha paid Rs 27 for a book kept for seven days, while Susy paid Rs 21 for the book she kept for five days. Find the fixed charge and the charge for each extra day.
A boat goes 30 km upstream and 44 km downstream in 10 hours. In 13 hours, it can go 40 km upstream and 55 km downstream.Ddetermine the speed of the stream and that of boat in water.
Solve by cross -multiplication method : x+y = a+b, ax-by = a2-b2
7710=1
0349=2
3009=3
3296=2
8371=x
Find X
The sum of the digits of a two digit number is 12. The number obtained by interchanging the two digits exceeds the given number by 18. FInd the number.
how do i find it ??
'A' takes 3 hours more than 'B' to walk a distance of 30km. But, if 'A' doubles his pace he is ahead of 'B' by 1.5 hrs. Find the speed of 'A' and 'B'?
solve the following simultaneous equations:
(i) 3/rootx+4/rooty=17/6 ; 5/rootx-6/rooty=1/2
(ii) 2(3x-y)=5xy ; 2(x=3y)=5xy (x is not equal to 0,y is not equal to 0)
Solve (a-b)x + (a+b)y = asquare - 2ab - b square and (a+b)(x+y) = a square +b square.
after covering a distance of 30 km with a uniform speed there is some defect in a train engine and therefore; its speed is reduced to 45 of its orignal speed.consequently, the train reaches is destination late by 45 minutes.Had it happened after covering 18 kilometers more, the train would have reached 9 minutes earlier.Find the speed of the train and the distance of the journey. HURRRRY HURRRY GIVE THE ANSWER
a boat covers 32km upstream and 36km downstream in 7hours. also it covers 40km upstream and 48km downstream in 9hours. find the speed of the boat in still water and that of stream?
For what values of a and b does the following pair of linear equations has a infinite number of solutions: 2x+3y=7; a(x+y)-b(x-y)=3a+b-2.
A part of monthly hostel charges is fixed and the remaining depends on the number of days one has taken food in the mess. When a student A takes food for 20 days she has to pay Rs. 1000 as hostel charges whereas a student B,who takes food for 26 days,pays Rs. 1180 as hostel charges. Find the fixed charges and the cost of food per day.
b/a x + a/b y = a2 + b2 , x+y =2ab solve for x and y
RD Sharma solution
A man walks a certain distance with certain speed. If he walks 1/2 km an hour faster, he takes 1 hour