800 cm2, 80 cm
400 cm, 80 cm2
80 cm, 800 cm2
400 cm2, 80 cm
Correct answer is D
Using Pythagoras theorem
⇒ (20√2)2=x2+x2
⇒ 800 = 2x2
⇒ 400 = x2
⇒ x = √400 = 20 cm
∴ Area of a square = x2=202=400cm2
∴ Perimeter of a square = 4x = 4 x 20 = 80 cm
Evaluate the integral ∫π4π122cos2xdx...
Make U the subject of the formula S = √6u−w2...
Find the rate of change of the volume, V of a sphere with respect to its radius, r when r = 1 ...
In the diagram, triangle MNR is inscribed in circle MNR, and line PQ is a straight line. ∠M...
Find the value of x at the minimum point of the curve y = x3 + x2 - x + 1 ...
In XYZ, |YZ| = 32cm, < YXZ 53o and XZY = 90o. Find, correct to the nearest centimetre, ...
If the price of oranges was raised by 12k per orange. The number of oranges a customer ...