CAN U PLS SOLVE ALL THESE QUESTIONS ASAP PLS PLS PLS PLS PLS PLS PLS PLS PLS PLS Frame the equations and solve: a) A number added to its half gives72.Find the number. b) Raju is four years younger than Biju. Sum of their ages is 28.Find their ages. c) Raj has 75 more stamps than Mani. The total number of stamps is 325.Find the number of stamps Mani has? d) The number of marbles Rohan has is 2 more than twice the number of marbles Mohan has. The number of marbles is 140.Find the number of marbles Rohan has e) Rahul is three times as old as his son’s age and sum of their age is 60.What is Rahul’s age? f) The sum of two consecutive numbers is 53, find the numbers. g) The length of the rectangle is twice its breadth. If the perimeter is 18cm. Find its length and breadth. h) The total number of students in a school is 2100. If the number of boys are 210 more than the number of girls. Find the number of boys and girls.
Answers
a.
let the age of Raju be x
therefore, the age of Biju = x + 4
the sum of their ages = x +( x+ 4) = 28
= 2x= 24
=> x = 12
therefore , raju's age is 12 and biju's age is x + 4 = 16
b.
No. of stamp mani has = x
no. of stamps raj has = x +75
total sum of stamps = 325 = 2x + 75
= 2x = 250
= x = 125
therefore mani has 125 stamps
c.
Mohan = x
Rohan = 2x + 2
total no. of marbles = 140
140 = x + (2x+ 2)
138 = 3x
x = 46
therefore rahul has 94 mables
d.
sons age = x
Rahul's age = 3x
3x + x = 60
x = 15
therefore Rahul's age is 3 . 15 = 45
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let the no. be x
now
x+x/2=72
=>3x=72×2
=>x=144÷3
=>x=48