40 workers can build a house in 30 days. After โyโ days, 15 workers left the work and the whole work was completed in 42 days. find number of days after which 15 workers left the work?
lawn is in the form of a rectangle having its breadth and length in the ratio 2 : 5. The area of the lawn is 1/8 hectare. The breadth of the lawn is (Approx. Value)
The width of all the three lines of the letter H is 3 mm. Length of two side lines are 6 mm. each and that of the middle line is 5 mm. The cost of the letter H in the birthday cake is 18 rupee/mm^2 in golden shining. Total cost for writing H in the cake will be
L, M, N enter into a partnership work with L receives Rs. 54000. If out of a total profit of Rs. 4500. L gets Rs. 1500 and M gets Rs.2100. N gets Rs.900, then M capital is
Let the breadth of rectangular hall = x m.
length = (x + 5) m.
Area of hall = Lร B
750 = (x + 5) x
x^2 + 5x โ 750 = 0
x^2 + 30x โ 25x โ 750 = 0
x (x + 30) โ 25 (x + 30) = 0
(x โ 25) (x + 30) = 0
x = 25, as x cannot be negative.
Length of hall = x + 5
= 25 + 5 = 30 m