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Grade 8

ASSET Question-A-Day | 22 February 2019

Grade 8 | Science

The first step that happens in a wastewater treatment plant is that the wastewater is made to pass through bar screens (as shown here).

Large objects like rags, sticks, cans, plastic packets, napkins etc get stuck on these bars. This step is similar to -
A
slicing vegetables into very thin slices
B
separating cream from milk using a sieve
C
using a broom to clean the dust on a floor
D
opening a window to allow fresh air to come inside

Yesterday's Question | Maths

Kaninik is making a decorative circular disk. He sticks triangular black coloured pieces on it as shown in the figure.

If the radius of the disk is 7 cm, which of these COULD be the area of the disk that is NOT covered by triangular pieces? 

A
112 sq cm
B
154 sq cm
C
180 sq cm
D
308 sq cm

Correct Answer: A