Question
A towel was 75 cm long and 120cm broad. When bleached,
it was to have lost 40% of its length and 20% breadth. The percentage of decrease in area is:Solution
Original area = 75 × 120 = 9,000 sq cm. Reduced length = 60% of 75 cm = 45 cm Reduced breadth = 80% of 120 cm = 96 cm Reduced area = 45 × 96 = 4,320 sq cm Reduction in area = 9,000 – 4,320 = 4,680 sq m. ∴ % Reduction = 4,680/(9,000 ) × 100 = 52%. ALTERNATE METHOD: Let Length of Rectange = 100 & breatdh of rectangle= 100 So area = L×B = 100×100 = 10000 So new length = 60 & new breadth = 80 So new area = L×B = 60×80 = 4800 ∴ % Reduction = (10000-4800)/10000× 100 = 5200/10000× 100 = 52%.
If ‘X’ is related to ‘W’ and ‘T’ is related to ‘S’ in a certain way, then ‘U’ is related to which of the following?
...How many persons sit between Y and the one who faces R?
How is U related to T?
Who sits opposite to F?
Five friends, P, Q, R, S and T are sitting in a row facing south. Q is sitting in the centre position. P is sitting at the west end. T and R are sitting...
How many persons are older than S?
If T sits third to the right of K then how many persons are sitting between T and N?
Who among the following person sits 2nd to the right of the one who sits opposite to S?
Who sits opposite to A?
How many persons sit between D and B, when counted from the left of D?
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