Homework / class - VII / Math Linear Equations MM: 10 Q. 1 Solve the following Equations (2 marks) (a) 4−2=6 (b) 3(+4)=15 Q. 2 Find the value of ℎ (2 marks) (a) 15+5=12−16 (b) 3−2(−2)=5(2−3)−2(3−1) Q. 3 Find the three consecutive even numbers whose sum is 96. (3 marks) Q. 4 The length of a rectangle is thrice of its breadth. If the perimeter of the rectangle is 56cm. Find its length and breadth. (3 marks)
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Answer:
Hey, the 1st question is wrong because there is no variable. and there is no "h" in the second question
but the answer of 4th question is here
given,
breadth=x
length = 3x (as it is thrice of breadth)
perimeter = 56 cm
perimeter of rectangle = 2(l+b)
56cm = 2 (3x+x)
56cm = 2 ( 4x )
56cm = 8x
x= 56/8
x = 7
therefore breadth = 7cm
and length as it is 3x = 7*3 = 21cm
hope it helped you
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