Ans 1:
Class : Class 7
DPQR has 4 sides and hence it has to be a quadrilateral. However in the solution it is said that " it is given that it is a triangle" so there must be a error in the question itself.
Ans 2:
Class : Class 8
DPQR is a quadrilateral figure because , a quadrilateral figure has 4 sides.
take a square of 4 sides
A. PQ - QR >PR
4 -4 > 4
0 >4
so no
B. PQ +QR < PR
4 + 4 < 4
8 < 4
so no
C. PQ -QR < PR
4 - 4 < 4
0 < 4
so yes
D. PQ + PR
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Ans 1:
Class : Class 5
option B) cycling A to B = 10 min Cycle and walk back = A to B to A = 20 min = cycle 10 min = walk B to A = 20 - 10 =10. So, walk 2 times = A to B to A = 10 two times = 20B) 20 correct
Ans 11:
Class : Class 9
Answer is C because A to B and B to A cycling is 5 min, so A to B and B to A walking is 15 min. So, 15 plus 15 = 30 min i.e. C.