Nikhil is writing a story. He has written `9(2)/(5)` pages so far. If he takes `1(1)/(4)` hours to write one page, how many hours has he spent on writing?

(3.86)/(x)+(180.2)/(10x)+(42.2)/(5x) The Ironman Triathlon originated in Hawaii in 1978. The format of the Ironman has not changed since then: It consists of a 3.86-km swim, a 180.2-km bicycle ride, and a 42.2-km run, all raced in that order and without a break. Suppose an athlete bikes 10 times as fast as he swims and runs 5 times as fast as he swims. The variable x in the expression above represents the rate at which the athlete swims, and the whole expression represents the number of hours that it takes him to complete the race. If it takes him 16.2 hours to complete the race, how many kilometers did he swim in 1 hour?

A man walks a certain distance with certain speed. If he walks 1//2 km an hour faster, he takes 1 hour less. But, if he walks 1 km an hour slower, he takes 3 more hours. Find the distance covered by the man and his original rate of walking.

A man working 8 hours a day takes 5 days to complete a project. How many hours a day must he work to complete it in 4 days ?

If Biff can shape 3 surfboards in 50 minutes, how many surfboards can he shape in 5 hours?

Nikhil has 16 marbles. He gives 3_(th)/(4) of these to Sanchit. How many marbles does Sanchit get?

Ashish studies for 4 hours, 5 hours and 3 hours respectively on three consecutive days. How many hours does he study daily on an average?

Sam read 15(1)/(3) pages of a novel on Sarturday and 17(7)/(12) pages on Sunday. How many more pages did he read on Sunday than on Saturday?

Wade is making a tile mosaic . He begins the project by laying tile at a speed of 50 pieces per hour for 3.5 hours . He is then interrupted from his work for 60 minutes . He resume working and lays tile at a speed of 35 pieces per hours until he has laid 280 pieces of tile total. How many hours did Wade spend working on the mosaic after he started working again ?