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Total work = 120 units (LCM of 30 and 40) Efficiency of ‘A’ = 120/30 = 4 units/day Efficiency of ‘B’ = 120/40 = 3 units/day According to the question, ‘A’ worked for ‘x’ days and ‘B’ worked for ‘2x days. Therefore, (4+3)x + 3 × 2x = 120 Or 7x + 6x = 120 Or x = 120/13 total time taken to complete the whole work = 3×120/13 =360/13 days =27.69days
A cuboidal box has dimensions of length = 18 cm, breadth = 15 cm, and height = 10 cm. If the breadth is increased by 20% and the height is decreased by ...
If 4539 = 540, 758 = 280, and 3745 = 420, then 2788 =___.
Simplify the following expression:
288 ÷ 12 x 6 + 56 x √4 - 676 ÷ 4
If A:B = 5:8 and C:B = 4:9 then find the value of (A:B:C) .
How many 3-digit numbers are divisible by 6 or 9?
An initial investment grows to four times its original amount in 6 years under compound interest. How many years will it take for the investment to grow...
Three positive numbers are in the ratio 2:3:4. The sum of their squares is 2349. The average of the largest and the second largest number is:
Find the simplified value of the given expression:
(1.44) -1.5 = ?