Question
Ananya and Riya can complete a task in 20 hours and 40
hours respectively. Ananya works alone for 10 hours and then Riya finishes the remaining task. How long does it take to complete the entire work?Solution
ATQ,
Let total work = LCM of 20 and 40 = 40 units Work done by Ananya in one hour = 40 / 20 = 2 units Work done by Riya in one hour = 40 / 40 = 1 unit Work done by Ananya in 10 hours = 10 × 2 = 20 units Remaining work = 40 – 20 = 20 units Time Riya takes to finish = 20 / 1 = 20 hours Total time = 10 + 20 = 30 hours
30.05% of 1279.98 - ? x 4.06 = 8.082
What approximate value should come in place of question mark in the following question?
√289.3 × 14.98 = ?
? = (6.1 × 64.93 ÷ 12.86) 1.97 – 49.98% of 359.77
8.15 of 124.95 ÷ 40.13 + 249.84 X 14.18 - √325 X 149.87 = ? X 10.85
- What approximate value will come in place of the question mark (?) in the following question? (Note: You are not expected to calculate the exact value.)
[(√2024.85 ÷ 3.01) + (35.76 ÷ 11.92)]² × (3/4 of 39.99) = ?
10562.41 - 7893.78 + 9647.35 + ? = 19500.24
?% of 1200.22 + 319.82 = 3.99 × 295.64
Simplify the following trigonometric expression:
...
12 cos 68o cosec 22o - 3 cot 72o cot 18oThe greatest number that will divide 398,436, and 542 leaving 7, 11, and 15 as remainders, respectively, is:
