Question
Gagan can do a piece of work in 14 days. Magan is 40%
more efficient than Gagan. How many days will Magan and Gagan together complete the work?Solution
Efficiency of Gagan : Magan 100 : 140 5 : 7 Time taken (reverse) 7 : 5 Actual time taken by Gagan = 14 days. Actual time taken by Magan (2 × 5) = 10 days. required answer = 1/10 + 1/14 = 24/140 days = 35/6 days Alternate Method: Let eff of Gagan = 100 then eff of Magan = 140 Time × Eff = constant 14×100 = T×140 T = 10 days required answer = 1/10 + 1/14 = 24/140 days = 35/6 days
Determine the simplified value of the expression: 12 × 15 - 20 + 15 + 12 - 18 + 3 × 4 + 18.
What will come in the place of question mark (?) in the given expression?
(63 - ?) ÷ 5 + √625 = 19 X (9 - 6)
Evaluate: 25 − 4 × (3 + 2) ÷ 5
√676 + (0.75 × 80) + (72 ÷ 3) = ? - 82
Simplify the following expressions and choose the correct option.
(72 ÷ 3) × (5/6) + 7² = ?
What should come in place of (?) question mark in the given expression.
(2/3 of 351) + (40% of 220) = ?
(6630 ÷ 13 + 6120 ÷ 12) ÷ (17 × 3) = ?Â
(26)2 = {(20% of 40% of 18200) ÷ ?} × 1664 ÷ 128Â
