The length of a rectangle is 10 cm. If its perimeter is 2...
The length of a rectangle is 10 cm. If its perimeter is 28 cm, find the area
30cm2
40cm2
60cm2
80cm2
Correct answer is B
perimeter = 2( length + breadth)
→ 28 = 2 (10+ b)
14 - 10 = b
b = 4
Area = length x breadth
10 x 4 → 40cm2
If y = x cos x, find dy/dx ...
A box contains 40 identical balls of which 10 are red and 12 are blue. if a ball is selected at...
Find the mean deviation of a set of numbers: 14, 15, 16, 17, 18, and 19. ...
cos 57o has the same value as...
Points X and Y are respectively 12m North and 5m east of point Z. Calculate XY ...