What is the formula 2πR for? The circumference of a maths quiz questions with answers for class 9 pdf 2.

What is missing out of the trio. If it takes 3 men 2 hours to dig a hole, how long will it theoretically take one man?

If a bag of 30 sweets weighs 20g, how many sweets would weigh 1kg? How many faces does a cube have?