Perimeter of a rectangle is 208cm. Its length is 57 cm. it width is…………..
a) 151
b) 259
c) 47
d) 87
Solution:P = 2(l + w)
208 = 2 (57 + w) 208 = 114 + 2w
2w = 208 ̶ 114 2w = 94
w = 94/2 w= 47
Area of a square having one side 15cm is……
a) 30 cm2
b)60 cm
c) 225 cm2
Solution:A = s. s
A = 15 cm× 15 cm A = 225 cm2
Area of rectangle having length 0.9m and width 0.5m is…………
a) 4.5 m2
b)2.8 m2
c)0.45 m2
Solution:A = l wA = 0.9m × 0.5m = 0.45m2
Base of a parallelogram is 10cm. what will be the area of the parallelogram if the length of its altitude is 7 cm?
a) 34 cm2
b)68 cm2
c) 70 cm2
Solution:Area = Base × height
A = 10 cm × 7cm = 70 cm2
Area of triangle having its base 9cm and altitude 10 cm is………..
a) 90 cm2
b)45 cm2
c) 76 cm2
