Abhishek Chauhan and Vivek Singhal Solutions for Chapter: Direct and Inverse Proportions, Exercise 3: Chapter Test

The given table shows the time for four elevators takes to travel various distances. Find which elevator is farthest and slowest:

If a deposit of $₹3000$ earns an interest of $₹600$ in $3$ years. Then how much interest would a deposit of $₹$$36000$ earn in $3$ years with the same rate of simple interest?

A contractor undertook a contract to complete a part of a stadium in $9$ months with a team of $560$ persons. Later on, it was required to complete the job in $5$ months How many extra people should he employ to complete the work?

$88$ cows can graze a field in $18$ days. How many less/more cows will graze the same field in $12$ days? 

Shabnam takes $20$ mins to reach the school. If she goes at $6$ km/hour, if she wants to reach in $24$ mins, what would be her speed?

The amount of extension in an elastic spring varies directly with the weight hanging on it. If weight of $450 g$ produces an extension of $4.2 cm$. Find the extension produced by the weight of $750 g$.

A swimming pool can be filled in $8 h$ by $3$ equal pumps. How many such pumps are required, if the pool is to be filled in $6 h$?

The weight of $3$ bags of rice is $120 \mathrm{kg}$. Find the weight of $11$ bags of rice.