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.
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%
132 × 3 ÷ 11 + 67 − ? = 64 ÷ 8 × 2
Ravi is 12 years younger than Surya. Ravi's age is 40% of the sum of his and Surya's age. What will be Surya's age 9 years hence?
140% of 1270 + 60% of 2085 = 1881 + ‘?’% of 287
30% of 60% of 1800 + 13 × 14 = (? ÷ 75) × 5
2*1/3 + 22*1/3 + 222*1/3 + 2222*1/2 + 22222*1/2 = ?
? = 15% of 2400 + 140% of 4200 – 12 3
24 × ?2 – 11 × 4 = 1900
(23.95)2 – (25.006)2 + (8.0099)2 – (7.07)2 = ? - (14.990)2
654.056 + 28.9015 × 44.851 – 43.129 = ?
