S Purkayastha Solutions for Chapter: Summative Assessment – 1, Exercise 12: Summative Assessment - 1

Find the value of $x$, if $x\mathbf{:}5\mathbf{:}\mathbf{:}27\mathbf{:}15$.

A typist take $88$ minutes to type $24$ pages. How long will he take to type $99$ pages?

A worker earns $₹639$ for working $6$ days. If his total wages during the month amount to $₹2769$, for how many days did he work?

Find $20\%$ of $₹500$.

Find $33\frac{1}{3}\%$ of $₹100$.

Find a number whose $5\%$ is $85$.

By selling a car for $₹34000$, a man loses $15\%$. If he sells the same car for $₹44000$, find his profit percent.

An amount is borrowed at simple interest for $25$ years. At the end of this period, this amount along with the interest has trebled itself. What was the rate percent?