9. Sanjay, Rajeev and Akshay can together weave a carpet in 6 days. Sanjay and Rajeev alone can weave it
in 15 days and 12 days, respectively. How long will Akshay alone take to weave the carpet?
Answers
Answer:
1.(d) Vinay’s amount = Rs(1540*25/100) = Rs 385
Sanjay’s amount = Rs.(385 + 36) => Rs. 421
2.(b) Let the breadth of the rectangle be x cm.
Now, according to the question,
Length of the rectangle = (x + 6) cm
(x + 6)x= 112 or, x^2 + 6x – 112 = 0
(x + 14) (x – 8) = 0 or, x = –14 or 8
Perimeter of the rectangle = 2(8 + 14)cm = 44 cm
3.(c)
4.(c)
5.(b)
6.(a)
Present age of Rehana = 85 – 7 = 78 years
Present age of Wasim = 78 – 12 = 66 years
Present age of Manoj = 3/11 × 66 = 18 years
Present age of Manoj’s father = 18 + 25 = 43 years
7.(b)
Suresh’s monthly income = 1.2 × 22000 = Rs.26400
Dinesh’s monthly income = 26400 × 4 = Rs.105600
8.(c)
9.(c) : Originally, let the number of boys and girls in the college be 7x and 8x respectively.
Their increased number is (120% of 7x) and (110% of 8x).
=> [120/100 x 7x] and [110/100 x 8x]
=> 42x/5 and 44x/5
=> The required ratio = 42x/5 : 44x/ 5] = 21 : 22
10.(c) : Let the original salaries of Ravi and Sumit be Rs. 2x and Rs. 3x respectively.
Then, (2x + 4000)/ (3x + 4000)= 40/57
=> 57(2x + 4000) = 40(3x + 4000)
=>6x = 68,000
=> 3x = 34,000
Sumit’s present salary = (3x + 4000) = Rs. (34000+ 4000) = Rs. 38,000
Answer:
Here's your answer.
Step-by-step explanation:
See the attachment.
