Question

3 3
28. A boy runs 1 km in 12 min. How long
will he take to run 400 m? DNV 1999]
(1) 4 min 80 s
(2) 5 min
(3) 6 min
(4) 12 min​

Answer 1

• $\huge\red{\mid{\fbox{\tt(answer)}\mid}}$Aerenchyma is a spongy tissue that forms spaces or air channels in the leaves, stems and roots of some plants, which allows exchange of gases between the shoot and the root.

Answer 2

1) 4 min 80 s is right answer