# If 56 Workers Can Build a Wall in 180 Hours, How Many Workers Will Be Required to Do the Same Work in 70 Hours? - Mathematics

Sum

If 56 workers can build a wall in 180 hours, how many workers will be required to do the same work in 70 hours?

#### Solution

Workers: Hours:: Workers: Hours

56     :    180  ::     x       :   70

∴ By inverse proportion

56 × 180 = x × 70

⇒"x"=(180xx56)/70

= 144 workers

Concept: Time and Work
Is there an error in this question or solution?

#### APPEARS IN

Selina Concise Mathematics Class 8 ICSE
Chapter 10 Direct and Inverse Variations
Exercise 10 (B) | Q 7 | Page 123