Question
The station master decides that the length of the
rectangular digital board be increased by 5% and the width be reduced to 7%. Find out the total change in the area.Solution
Let length and breadth of the rectangle be x and y respectively. As we know, Area of the rectangle = xy New length of the rectangle = x × 105/100 = 1.05x New breadth of the rectangle = y × 93/100 = 0.93 New area of the rectangle = 1.05x × 0.93y = 0.9765xy Area decreased by (in %) = [(xy-0.9765xy) /xy] x 100  = 2.35%
Find the HCF of 244 and 118.
The least number which when divided by 3, 9, 27 and 81 leave remainder 2, 8, 26 and 80 respectively is?Â
- The least common multiple (LCM) of two numbers is 144, and the numbers are in the ratio 4:6. Find their sum.
A farmer has 1517 cows and 902 sheep. He farms them into flocks, keeping cows and sheep separate and having the same number of animals in each flock. If...
The greatest number of four digits which when divided by 10, 12, 14 leave remainders 8, 10, 12 respectively is:
The smallest number which when divided by 28 and 32 leaves remainder 10 and 14 respectively is:
- The total and the difference of L.C.M and H.C.F of two numbers are 432 and 96. If one of the numbers is 24, what is the other number?
The H.C.F of two numbers is 2 and their L.C.M is 117. If one of the numbers is 13, find the other?
LCM of 21 5 , 21 10 and 21 15 is?
(1). 21 5
(2). 21 15
(3).2130
The least number which when divided by 8, 10, 12 and 15 leave zero remainder in each case and when divided by 16 leaves a remainder of 8 is:
