Question

the cost of 140 tennis ball is rules 4900 find the cost of 2 dozen such balls

Answer 1

140 tennis ball is of = 4900
cost of 2 dozen or 24 tennis balls = 4900 × 24 /140 = 840

Answer 2

Cost of 140 tennis ball=4900
Therefore, cost of 1 tennis ball= 4900÷140
= 35
Therefore, cost of 2 dozen of such balls= 35×24
=840