Question
The length and breadth of a rectangular field are
increased by 25% and 45%, respectively. If the original dimensions of the field are 60 m in length and 40 m in breadth, what is the percentage increase in the perimeter?Solution
Original perimeter of rectangular field = 2 × (60 + 40) = 200 m Increased length of rectangular field = 1.25 × 60 = 75 m Increased breadth of rectangular field = 1.45 × 40 = 58 m Increased perimeter of rectangular field = 2 × (75 + 58) = 266 m Required percentage increase = {(266 – 200)/200} × 100 = 33%
6 0 - 20 [8 + 12 {8-8 (20-12)+20}-40] ÷ 16 =?
Simplify the following expressions and choose the correct option.
[(13)² − (9)²] × (5/8) = ?
(25 × 12 + 30 × 8 – 22 × 10) = ?
√1764 + 35 × 8 + 39 = ?2
If a nine-digit number 389x6378y is divisible by 72, then the value of √(6x + 7y) will be∶
72 – 4(40 + 24 ÷ 6 × 6 – 4 × 4) + 40
36% of 250 – 18% of 200 = 30% of ?
32 of (16/8) of (30/24) of (120/x) = 30
- What will come in place of (?), in the given expression.
(81 ÷ 9) + (121 ÷ 11) + (64 ÷ 8) = ? Simplify:
0.48 ÷ 0.06 + 0.75 × (4/5)
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