If radius of a sphere is decreased by 48%, then by what percent does its surface area decrease?
Let the radius of sphere = 100 Area of sphere = 4π ×10000 When radius decreased by 48% So, radius =52 Then area = 4π×2704 Decreased surface area = 10000-2704=7296 Percent of decrease = (7296/10000) ×100 =72.96%
The speed of the stream is 10 km/h. Boat ‘A’ covers 110 km distance against the stream in 11 hours and boat ‘B’ covers 65 km distance against th...
(21 × 51 + 81)/(9 × 14 - 30) = ?
What will be the value of the following expression?
0.04 ÷0.002 × 0.05 × 50
42 + 52% of 300 - ?% of 200 = 88
(5/7) of (7/11) of (3/5) of 52% of 4400 = ? - (44)2 + (50)2 - (62% of 1750) - (188 ÷ 9.4)
60 = (? x 10 + 250)/5
132 × 3 ÷ 11 + 67 − ? = 64 ÷ 8 × 2
34 × 5 × 2 ÷ 6 + 7 × 5 + 13 = (?)× 6 – 754
324² × 36 ÷ 18⁵ × 1120 =?
