Question

LINEAR
8. The sum of three consecutive multiples of 7
is 777. Find the multiples.
9. The number of boys and girls in a class are in
the ratio 9 : 5. The number of girls is 12 less
than the number of boys. What is the total
strength of the class ?
3
10. A rational number is such that when you
4
multiply it by and subtract from the
-4
product, you get
What is the number?
11
7
.
7
11. The width of a rectangle is three-fourths its
length. If the perimeter is 210 m, find the
dimensions of the rectangle.​

Answer 1

Step-by-step explanation:

Three consecutive multiples are 110,121 and 132 which has the sum of 363. 33C = 363; C = 33, By substituting C = 33 in numbers 11C, 11(C – 1) and 11(C + 1) we get values 110, 121, 132.

As given,the three consecutive multiples of 7 will be of the form:

x,x+7 and x+14

Then according to the question,

x+x+7+x+14=777

3x+21=777

3x=756

x=

3

756

=252

Multiples are 252,259,266.

December 26, 2019